Dispossession, Oppression And Depression
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Depression is a
mental state A mental state, or a mental property, is a state of mind of a person. Mental states comprise a diverse class, including perception, pain/pleasure experience, belief, desire, intention, emotion, and memory. There is controversy concerning the exact ...
of low mood and aversion to activity. It affects about 3.5% of the
global population In world demographics, the world population is the total number of humans currently alive. It was estimated by the United Nations to have exceeded eight billion in mid-November 2022. It took around 300,000 years of human prehistory and histor ...
, or about 280 million people worldwide, as of 2020. Depression affects a person's
thoughts In their most common sense, the terms thought and thinking refer to cognitive processes that can happen independently of sensory stimulation. Their most paradigmatic forms are judging, reasoning, concept formation, problem solving, and delibe ...
,
behavior Behavior (American English) or behaviour (British English) is the range of actions of Individual, individuals, organisms, systems or Artificial intelligence, artificial entities in some environment. These systems can include other systems or or ...
,
feelings According to the '' APA Dictionary of Psychology'', a feeling is "a self-contained phenomenal experience"; feelings are "subjective, evaluative, and independent of the sensations, thoughts, or images evoking them". The term ''feeling'' is closel ...
, and sense of well-being. The pleasure or joy that a person gets from certain experiences is reduced, and the afflicted person often experiences a loss of motivation or interest in those activities. People with depression may experience
sadness Sadness is an emotional pain associated with, or characterized by, feelings of disadvantage, loss, despair, grief, helplessness, disappointment and sorrow. An individual experiencing sadness may become quiet or lethargic, and withdraw the ...
, feelings of dejection or hopelessness, difficulty in thinking and concentration, or a significant change in appetite or time spent sleeping;
suicidal thoughts Suicidal ideation, or suicidal thoughts, is the thought process of having ideas or ruminations about the possibility of dying by suicide.World Health Organization, ''ICD-11 for Mortality and Morbidity Statistics'', ver. 09/2020MB26.A Suicidal i ...
can also be experienced. Depression can have multiple, sometimes overlapping, origins. Depression can be a symptom of some
mood disorders A mood disorder, also known as an affective disorder, is any of a group of conditions of mental and behavioral disorder where the main underlying characteristic is a disturbance in the person's mood. The classification is in the ''Diagnostic ...
, some of which are also commonly called ''depression'', such as
major depressive disorder Major depressive disorder (MDD), also known as clinical depression, is a mental disorder characterized by at least two weeks of pervasive depression (mood), low mood, low self-esteem, and anhedonia, loss of interest or pleasure in normally ...
,
bipolar disorder Bipolar disorder (BD), previously known as manic depression, is a mental disorder characterized by periods of Depression (mood), depression and periods of abnormally elevated Mood (psychology), mood that each last from days to weeks, and in ...
and
dysthymia Dysthymia ( ), known as persistent depressive disorder (PDD) in the DSM-5-TR and dysthymic disorder in ICD-11, is a psychiatric condition marked by symptoms that are similar to those of major depressive disorder, but which persist for at leas ...
. Additionally, depression can be a normal temporary reaction to life events, such as the loss of a loved one. Depression is also a symptom of some physical diseases and a side effect of some drugs and medical treatments.


Contributing factors


Life events

Adversity in childhood, such as bereavement, neglect, mental abuse, physical abuse, sexual abuse, or unequal parental treatment of siblings, can contribute to depression in adulthood. Childhood physical or sexual abuse in particular significantly correlates with the likelihood of experiencing depression over the survivor's lifetime. People who have experienced four or more
adverse childhood experiences Adverse childhood experiences (ACEs) include childhood emotional, physical, or sexual abuse and household dysfunction during childhood. The categories are verbal abuse, physical abuse, contact sexual abuse, a battered mother/father, household sub ...
are 3.2 to 4.0 times more likely to suffer from depression. Poor housing quality, non-functionality, lack of green spaces, and exposure to noise and air pollution are linked to depressive moods, emphasizing the need for consideration in planning to prevent such outcomes. Locality has also been linked to depression and other negative moods. The rate of depression among those who reside in large urban areas is shown to be lower than those who do not. Likewise, those from smaller towns and rural areas tend to have higher rates of depression, anxiety, and psychological unwellness. Studies have consistently shown that physicians have had the highest depression and suicide rates compared to people in many other lines of work—for suicide, 40% higher for male physicians and 130% higher for female physicians. Life events and changes that may cause depressed mood includes, but are not limited to, childbirth, menopause, financial difficulties, unemployment, stress (such as from work, education, military service, family, living conditions, marriage, etc.), a medical diagnosis (cancer, HIV, diabetes, etc.), bullying, loss of a loved one, natural disasters, social isolation, rape, relationship troubles, jealousy, separation, or
catastrophic injury A catastrophic injury is a severe injury to the spine, spinal cord, or brain. It may also include skull or spinal fractures. This is a subset of the definition for the legal term ''catastrophic injury'', which is based on the definition used by ...
. Similar depressive symptoms are associated with
survivor's guilt Survivor guilt or survivor's guilt (also survivor syndrome, survivor's syndrome, survivor disorder and survivor's disorder) happens when individuals feel guilty after they survive a tragic, near death, or traumatic event when others perished. It ...
. Adolescents may be especially prone to experiencing a depressed mood following
social rejection Social rejection occurs when an individual is deliberately excluded from a social relationship or social interaction. The topic includes ''interpersonal rejection'' (or peer rejection), ''romantic rejection'', and ''familial estrangement''. A pe ...
, peer pressure, or bullying.


Childhood and adolescence

Depression in childhood and adolescence is similar to adult major depressive disorder, although young sufferers may exhibit increased irritability or behavioral dyscontrol instead of the more common sad, empty, or hopeless feelings seen with adults. Children who are under stress, experiencing loss, or have other underlying disorders are at a higher risk for depression. Childhood depression is often comorbid with
mental disorders A mental disorder, also referred to as a mental illness, a mental health condition, or a psychiatric disability, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. A mental disorder is ...
outside of other mood disorders; most commonly
anxiety disorder Anxiety disorders are a group of mental disorders characterized by significant and uncontrollable feelings of anxiety and fear such that a person's social, occupational, and personal functions are significantly impaired. Anxiety may cause phys ...
and
conduct disorder Conduct disorder (CD) is a mental disorder diagnosed in childhood or adolescence that presents itself through a repetitive and persistent pattern of behavior that includes theft, lies, physical violence that may lead to destruction, and reck ...
. Depression also tends to run in families.


Personality

Depression is associated with low
extraversion Extraversion and introversion are a central trait dimension in human personality theory. The terms were introduced into psychology by Carl Jung, though both the popular understanding and current psychological usage are not the same as Jung's ...
, and people who have high levels of
neuroticism Neuroticism is a personality trait associated with negative emotions. It is one of the Big Five traits. Individuals with high scores on neuroticism are more likely than average to experience such feelings as anxiety, worry, fear, anger, shame ...
are more likely to experience depressive symptoms and are more likely to receive a diagnosis of a depressive disorder. Additionally, depression is associated with low
conscientiousness Conscientiousness is the personality trait of being responsible, :wikt:careful, careful, or :wikt:diligent, diligent. Conscientiousness implies a desire to do a task well, and to take obligations to others seriously. Conscientious people tend to ...
. Some factors that may arise from low conscientiousness include disorganization and dissatisfaction with life. Individuals may be more exposed to stress and depression as a result of these factors.


Side effect of medical treatment

It is possible that some early generation
beta-blocker Beta blockers, also spelled β-blockers, are a class of medications that are predominantly used to manage abnormal heart rhythms ( arrhythmia), and to protect the heart from a second heart attack after a first heart attack (secondary prevention) ...
s induce depression in some patients, though the evidence for this is weak and conflicting. There is strong evidence for a link between alpha interferon therapy and depression. One study found that a third of alpha interferon-treated patients had developed depression after three months of treatment. (''Beta'' interferon therapy appears to have no effect on rates of depression.) There is moderately strong evidence that
finasteride Finasteride, sold under the brand names Proscar and Propecia among others, is a medication used to treat pattern hair loss and benign prostatic hyperplasia (BPH) in men. It can also be used to treat hirsutism, excessive hair growth in women. It ...
when used in the treatment of alopecia increases depressive symptoms in some patients. Evidence linking
isotretinoin Isotretinoin, also known as 13-''cis''-retinoic acid and sold under the brand name Accutane among others, is a medication used to treat skin diseases like harlequin-type ichthyosis, and lamellar ichthyosis, and severe cystic acne or moderat ...
, an acne treatment, to depression is strong. Other medicines that seem to increase the risk of depression include
anticonvulsants Anticonvulsants (also known as antiepileptic drugs, antiseizure drugs, or anti-seizure medications (ASM)) are a diverse group of pharmacological agents used in the treatment of epileptic seizures. Anticonvulsants are also used in the treatment ...
,
antimigraine drug Antimigraine drugs are medications intended to reduce the effects or intensity of migraine headache. They include drugs for the treatment of acute migraine symptoms as well as drugs for the prevention of migraine attacks. Treatment of acute sym ...
s,
antipsychotics Antipsychotics, previously known as neuroleptics and major tranquilizers, are a class of psychotropic medication primarily used to manage psychosis (including delusions, hallucinations, paranoia or disordered thought), principally in schizo ...
and
hormonal agents A hormone (from the Greek participle , "setting in motion") is a class of signaling molecules in multicellular organisms that are sent to distant organs or tissues by complex biological processes to regulate physiology and behavior. Hormones are ...
such as
gonadotropin-releasing hormone agonist A gonadotropin-releasing hormone agonist (GnRH agonist) is a type of medication which affects gonadotropins and sex hormones. They are used for a variety of indications including in fertility medicine and to lower sex hormone levels in the tre ...
.


Substance-induced

Several drugs of abuse can cause or exacerbate depression, whether in intoxication, withdrawal, and from chronic use. These include alcohol, sedatives (including prescription
benzodiazepine Benzodiazepines (BZD, BDZ, BZs), colloquially known as "benzos", are a class of central nervous system (CNS) depressant, depressant drugs whose core chemical structure is the fusion of a benzene ring and a diazepine ring. They are prescribed t ...
s), opioids (including prescription pain killers and illicit drugs such as heroin), stimulants (such as cocaine and amphetamines), hallucinogens, and
inhalants Inhalants are a broad range of household and industrial chemicals whose volatile vapors or pressurized gases can be concentrated and breathed in via the nose or mouth to produce intoxication, in a manner not intended by the manufacturer. They ...
.


Non-psychiatric illnesses

Depressed mood can be the result of a number of infectious diseases,
nutritional deficiencies Malnutrition occurs when an organism gets too few or too many nutrients, resulting in health problems. Specifically, it is a Deficiency (medicine), deficiency, excess, or imbalance of energy, protein and Vitamin deficiency, other nutrients whic ...
, neurological conditions, and physiological problems, including
hypoandrogenism Androgen deficiency is a medical condition characterized by insufficient androgenic activity in the body. Androgen deficiency most commonly affects women, and is also called Female androgen insufficiency syndrome (FAIS), although it can happen in ...
(in men),
Addison's disease Addison's disease, also known as primary adrenal insufficiency, is a rare long-term endocrine disorder characterized by inadequate production of the steroid hormones cortisol and aldosterone by the two outer layers of the cells of the adr ...
,
Cushing's syndrome Cushing's syndrome is a collection of signs and symptoms due to prolonged exposure to glucocorticoids such as cortisol. Signs and symptoms may include high blood pressure, abdominal obesity but with thin arms and legs, reddish stretch marks, ...
,
pernicious anemia Pernicious anemia is a disease where not enough red blood cells are produced due to a deficiency of Vitamin B12, vitamin B12. Those affected often have a gradual onset. The most common initial symptoms are Fatigue, feeling tired and weak. Other ...
,
hypothyroidism Hypothyroidism is an endocrine disease in which the thyroid gland does not produce enough thyroid hormones. It can cause a number of symptoms, such as cold intolerance, poor ability to tolerate cold, fatigue, extreme fatigue, muscle aches, co ...
,
hyperparathyroidism Hyperparathyroidism is an increase in parathyroid hormone (PTH) levels in the blood. This occurs from a disorder either within the parathyroid glands ( primary hyperparathyroidism) or as response to external stimuli ( secondary hyperparathyroi ...
,
Lyme disease Lyme disease, also known as Lyme borreliosis, is a tick-borne disease caused by species of ''Borrelia'' bacteria, Disease vector, transmitted by blood-feeding ticks in the genus ''Ixodes''. It is the most common disease spread by ticks in th ...
,
multiple sclerosis Multiple sclerosis (MS) is an autoimmune disease resulting in damage to myelinthe insulating covers of nerve cellsin the brain and spinal cord. As a demyelinating disease, MS disrupts the nervous system's ability to Action potential, transmit ...
,
Parkinson's disease Parkinson's disease (PD), or simply Parkinson's, is a neurodegenerative disease primarily of the central nervous system, affecting both motor system, motor and non-motor systems. Symptoms typically develop gradually and non-motor issues become ...
,
celiac disease Coeliac disease (British English) or celiac disease (American English) is a long-term autoimmune disorder, primarily affecting the small intestine. Patients develop intolerance to gluten, which is present in foods such as wheat, rye, spel ...
, chronic pain, stroke, diabetes, cancer, and HIV. Studies have found that anywhere from 30 to 85 percent of patients suffering from chronic pain are also clinically depressed. A 2014 study by Hooley et al. concluded that chronic pain increased the chance of death by suicide by two to three times. In 2017, the British Medical Association found that 49% of UK chronic pain patients also had depression. As many as 1/3 of stroke survivors will later develop post-stroke depression. Because strokes may cause damage to the parts of the brain involved in processing emotions, reward, and cognition, stroke may be considered a direct cause of depression.


Psychiatric syndromes

A number of psychiatric syndromes feature depressed mood as a main symptom. The
mood disorder A mood disorder, also known as an affective disorder, is any of a group of conditions of mental and behavioral disorder where the main underlying characteristic is a disturbance in the person's mood. The classification is in the ''Diagnostic ...
s are a group of disorders considered to be primary disturbances of mood. These include
major depressive disorder Major depressive disorder (MDD), also known as clinical depression, is a mental disorder characterized by at least two weeks of pervasive depression (mood), low mood, low self-esteem, and anhedonia, loss of interest or pleasure in normally ...
(commonly called major depression or clinical depression) where a person has at least two weeks of depressed mood or a loss of interest or pleasure in nearly all activities; and
dysthymia Dysthymia ( ), known as persistent depressive disorder (PDD) in the DSM-5-TR and dysthymic disorder in ICD-11, is a psychiatric condition marked by symptoms that are similar to those of major depressive disorder, but which persist for at leas ...
, a state of chronic depressed mood, the symptoms of which do not meet the severity of a
major depressive episode A major depressive episode (MDE) is a period characterized by symptoms of major depressive disorder. Those affected primarily exhibit a depressive mood for at least two weeks or more, and a loss of interest or pleasure in everyday activities. Oth ...
. Another mood disorder,
bipolar disorder Bipolar disorder (BD), previously known as manic depression, is a mental disorder characterized by periods of Depression (mood), depression and periods of abnormally elevated Mood (psychology), mood that each last from days to weeks, and in ...
, features one or more episodes of abnormally elevated mood,
cognition Cognition is the "mental action or process of acquiring knowledge and understanding through thought, experience, and the senses". It encompasses all aspects of intellectual functions and processes such as: perception, attention, thought, ...
, and energy levels, but may also involve one or more episodes of depression. Individuals with bipolar depression are often misdiagnosed with unipolar depression. When the course of depressive episodes follows a seasonal pattern, the disorder (major depressive disorder, bipolar disorder, etc.) may be described as a
seasonal affective disorder Seasonal affective disorder (SAD) is a mood disorder subset in which people who typically have normal mental health throughout most of the year exhibit depressive symptoms at the same time each year. It is commonly, but not always, associated w ...
. Outside the mood disorders:
borderline personality disorder Borderline personality disorder (BPD) is a personality disorder characterized by a pervasive, long-term pattern of significant interpersonal relationship instability, an acute fear of Abandonment (emotional), abandonment, and intense emotiona ...
often features an extremely intense depressive mood;
adjustment disorder with depressed mood Adjustment disorder is a mental and behavioral disorder defined by a maladaptive response to a psychosocial stressor. The maladaptive response usually involves otherwise normal emotional and behavioral reactions that manifest more intensely tha ...
is a psychological response to an identifiable event or stressor, in which the resulting emotional or behavioral symptoms are significant but do not meet the criteria for a major depressive episode; and
posttraumatic stress disorder Post-traumatic stress disorder (PTSD) is a mental disorder that develops from experiencing a Psychological trauma, traumatic event, such as sexual assault, domestic violence, child abuse, warfare and its associated traumas, natural disaster ...
, a mental disorder that sometimes follows
trauma Trauma most often refers to: *Psychological trauma, in psychology and psychiatric medicine, refers to severe mental and emotional injury caused by distressing events *Traumatic injury, sudden physical injury caused by an external force, which doe ...
, is commonly accompanied by depressed mood.


Inflammation


Historical legacy

Research suggests possible associations between
Neanderthal genetics Neanderthal genetics testing became possible in the 1990s with advances in ancient DNA analysis. In 2008, the Neanderthal genome project published the full sequence Neanderthal mitochondrial DNA (mtDNA), and in 2010 the full Neanderthal genome. G ...
and some forms of depression. Authors and researchers have begun to conceptualize ways in which the historical legacies of
racism Racism is the belief that groups of humans possess different behavioral traits corresponding to inherited attributes and can be divided based on the superiority of one Race (human categorization), race or ethnicity over another. It may also me ...
and
colonialism Colonialism is the control of another territory, natural resources and people by a foreign group. Colonizers control the political and tribal power of the colonised territory. While frequently an Imperialism, imperialist project, colonialism c ...
may create depressive conditions. Given the lived experiences of marginalized peoples, ranging from conditions of
migration Migration, migratory, or migrate may refer to: Human migration * Human migration, physical movement by humans from one region to another ** International migration, when peoples cross state boundaries and stay in the host state for some minimum le ...
,
class stratification Class stratification is a form of social stratification in which a society is separated into parties whose members have different access to resources and power. An economic, natural, cultural, religious, interests and ideal rift usually exists b ...
,
cultural genocide Cultural genocide or culturicide is a concept first described by Polish lawyer Raphael Lemkin in 1944, in the same book that coined the term ''genocide''. The destruction of culture was a central component in Lemkin's formulation of genocide ...
,
labor exploitation Forced labour, or unfree labour, is any work relation, especially in modern or early modern history, in which people are employed against their will with the threat of destitution, detention, or violence, including death or other forms of ...
, and social immobility, depression can be seen as a "rational response to global conditions", according to Ann Cvetkovich. Psychogeographical depression overlaps somewhat with the theory of "deprejudice", a portmanteau of "depression" and "
prejudice Prejudice can be an affect (psychology), affective feeling towards a person based on their perceived In-group and out-group, social group membership. The word is often used to refer to a preconceived (usually unfavourable) evaluation or classifi ...
" proposed by Cox, Abramson, Devine, and Hollon in 2012, who argue for an integrative approach to studying the often comorbid experiences. Cox, Abramson, Devine, and Hollon are concerned with the ways in which social
stereotype In social psychology, a stereotype is a generalization, generalized belief about a particular category of people. It is an expectation that people might have about every person of a particular group. The type of expectation can vary; it can ...
s are often
internalized Internalization may refer to: *Internalization (sociology) *Internalization (psychology) **Internalizing disorder *Internalization (biology) *Internalization theory **Internalization (economics) In economics, an externality is an indirect cost ...
, creating negative self-stereotypes that then produce depressive symptoms. Unlike the theory of "deprejudice", a psychogeographical theory of depression attempts to broaden study of the subject beyond an individual experience to one produced on a societal scale, seeing particular manifestations of depression as rooted in dispossession; historical legacies of
genocide Genocide is violence that targets individuals because of their membership of a group and aims at the destruction of a people. Raphael Lemkin, who first coined the term, defined genocide as "the destruction of a nation or of an ethnic group" by ...
,
slavery Slavery is the ownership of a person as property, especially in regards to their labour. Slavery typically involves compulsory work, with the slave's location of work and residence dictated by the party that holds them in bondage. Enslavemen ...
, and colonialism are productive of segregation, both material and psychic material deprivation, and concomitant circumstances of violence, systemic exclusion, and lack of access to legal protections. The demands of navigating these circumstances compromise the resources available to a population to seek comfort, health, stability, and sense of security. The historical memory of this
trauma Trauma most often refers to: *Psychological trauma, in psychology and psychiatric medicine, refers to severe mental and emotional injury caused by distressing events *Traumatic injury, sudden physical injury caused by an external force, which doe ...
conditions the psychological health of future generations, making psychogeographical depression an intergenerational experience as well. This work is supported by recent studies in genetic science which has demonstrated an
epigenetic In biology, epigenetics is the study of changes in gene expression that happen without changes to the DNA sequence. The Greek prefix ''epi-'' (ἐπι- "over, outside of, around") in ''epigenetics'' implies features that are "on top of" or "in ...
link between the trauma suffered by
Holocaust survivor Holocaust survivors are people who survived the Holocaust, defined as the persecution and attempted annihilation of the Jews by Nazi Germany and Collaboration with Nazi Germany and Fascist Italy, its collaborators before and during World War II ...
s and genetic reverberations in subsequent generations.


Measures

Measures of depression include, but are not limited to: Beck Depression Inventory-11 and the 9-item depression scale in the
Patient Health Questionnaire The Patient Health Questionnaire (PHQ) is a multiple-choice self-report inventory that is used as a screening and diagnostic tool for mental health disorders of depression, anxiety, alcohol, eating, and somatoform disorders. It is the self-rep ...
(PHQ-9). Both of these measures are psychological tests that ask personal questions of the participant, and have mostly been used to measure the severity of depression. The Beck Depression Inventory is a self-report scale that helps a therapist identify the patterns of depression symptoms and monitor recovery. The responses on this scale can be discussed in therapy to devise interventions for the most distressing symptoms of depression.


Theories

There are multiple
schools A school is the educational institution (and, in the case of in-person learning, the building) designed to provide learning environments for the teaching of students, usually under the direction of teachers. Most countries have systems of ...
of depression theory. Beck's cognitive triad theorizes that an individual with depression has "automatic, spontaneous, and seemingly uncontrollable negative thoughts" about the self, the world or environment, and the future. The
Tripartite Model of Anxiety and Depression Watson and Clark (1991) proposed the Tripartite Model of Anxiety and Depression to help explain the comorbidity between anxious and depressive symptoms and disorders.Anderson, E., & HOPE, D. (2008). A review of the tripartite model for understandin ...
helps to explain the common comorbidity of anxiety and depression by separating symptoms into three groups: negative affect, positive affect, and physiological hyperarousal. The epigenetics of depression is the study of how
epigenetics In biology, epigenetics is the study of changes in gene expression that happen without changes to the DNA sequence. The Greek prefix ''epi-'' (ἐπι- "over, outside of, around") in ''epigenetics'' implies features that are "on top of" or "in ...
(heritable characteristics that do not involve changes in DNA sequence) contribute to depression.
Behavioral theories of depression Behavioral theories of depression explain the etiology of depression based on the behavioural sciences; adherents promote the use of behavioral therapies for depression. Behavioral theories Introduction Depression is a significant mental illness ...
explain the
etiology Etiology (; alternatively spelled aetiology or ætiology) is the study of causation or origination. The word is derived from the Greek word ''()'', meaning "giving a reason for" (). More completely, etiology is the study of the causes, origins ...
of depression with
behavioral science Behavioural science is the branch of science concerned with Human behavior, human behaviour.Hallsworth, M. (2023). A manifesto for applying behavioural science. ''Nature Human Behaviour'', ''7''(3), 310-322. While the term can technically be ap ...
; adherents promote the use of behavioral therapies for treatment.
Evolutionary approaches to depression Evolutionary approaches to depression are attempts by evolutionary psychologists and evolutionary psychiatrists to use the theory of evolution to further understand mood disorders. Depression is generally thought of as dysfunction or a mental ...
are attempts by
evolutionary psychologists Evolution is the change in the heritable Phenotypic trait, characteristics of biological populations over successive generations. It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, re ...
and evolutionary psychiatrists to use the theory of
evolution Evolution is the change in the heritable Phenotypic trait, characteristics of biological populations over successive generations. It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, re ...
to further understand
mood disorder A mood disorder, also known as an affective disorder, is any of a group of conditions of mental and behavioral disorder where the main underlying characteristic is a disturbance in the person's mood. The classification is in the ''Diagnostic ...
s. The
biology of depression The biology of depression is the attempt to identify a biochemical origin of depression, as opposed to theories that emphasize psychological or situational causes. Scientific studies have found that different brain areas show altered activity in ...
is the attempt to identify a biochemical origin of depression, as opposed to theories that emphasize psychological or situational causes.


Management

Depressed mood may not require professional treatment, and may be a normal temporary reaction to life events, a symptom of some medical condition, or a
side effect In medicine, a side effect is an effect of the use of a medicinal drug or other treatment, usually adverse but sometimes beneficial, that is unintended. Herbal and traditional medicines also have side effects. A drug or procedure usually use ...
of some drugs or medical treatments. A prolonged depressed mood, especially in combination with other symptoms, may lead to a diagnosis of a psychiatric or medical condition which may benefit from treatment. The UK
National Institute for Health and Care Excellence The National Institute for Health and Care Excellence (NICE) is an executive non-departmental public body of the Department of Health and Social Care (United Kingdom), Department of Health and Social Care. As the national health technolog ...
(NICE) 2009 guidelines indicate that
antidepressant Antidepressants are a class of medications used to treat major depressive disorder, anxiety disorders, chronic pain, and addiction. Common side effects of antidepressants include Xerostomia, dry mouth, weight gain, dizziness, headaches, akathi ...
s should not be routinely used for the initial treatment of mild depression, because the risk-benefit ratio is poor. Physical activity has a protective effect against the emergence of depression in some people. Increased daily step counts have been associated with lower depressive symptoms. There is limited evidence suggesting yoga may help some people with depressive disorders or elevated levels of depression, but more research is needed. Reminiscence of old and fond memories is another alternative form of treatment, especially for the elderly who have lived longer and have more experiences in life. It is a method that causes a person to recollect memories of their own life, leading to a process of self-recognition and identifying familiar stimuli. By maintaining one's personal past and identity, it is a technique that stimulates people to view their lives in a more objective and balanced way, causing them to pay attention to positive information in their life stories, which would successfully reduce depressive mood levels. Depression is a common condition among the elderly living in
long-term care Long-term care (LTC) is a variety of services which help meet both the medical and non-medical needs of people with a chronic illness or disability who cannot care for themselves for long periods. Long-term care is focused on individualized and ...
(LTC) facilities. Although
antidepressant Antidepressants are a class of medications used to treat major depressive disorder, anxiety disorders, chronic pain, and addiction. Common side effects of antidepressants include Xerostomia, dry mouth, weight gain, dizziness, headaches, akathi ...
medications are frequently prescribed, many residents prefer non-pharmacological treatments such as psychological therapies. A systematic review of 19 randomized controlled trials found that therapies like cognitive behavioural therapy, behavioural therapy, and reminiscence therapy may reduce depressive symptoms and improve short-term quality of life. However, the evidence was of very low certainty, and some participants were more likely to drop out of therapy. There was no clear effect on symptoms, with only short term improvements seen with psychological therapies. Further high-quality studies are needed. There is limited evidence that continuing antidepressant medication for one year reduces the risk of depression recurrence with no additional harm. Recommendations for psychological treatments or combination treatments in preventing recurrence are not clear.


Epidemiology

Depression is the leading cause of disability worldwide, the United Nations (UN) health agency reported, estimating that it affects more than 300 million people worldwide – the majority of them women, young people and the elderly. An estimated 4.4 percent of the global population has depression, according to a report released by the UN World Health Organization (WHO), which shows an 18 percent increase in the number of people living with depression between 2005 and 2015. Depression is a major mental-health cause of
disease burden Disease burden is the impact of a health problem as measured by financial cost, mortality, morbidity, or other indicators. It is often quantified in terms of quality-adjusted life years (QALYs) or disability-adjusted life years (DALYs). Both ...
. Its consequences further lead to significant burden in
public health Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". Analyzing the de ...
, including a higher risk of
dementia Dementia is a syndrome associated with many neurodegenerative diseases, characterized by a general decline in cognitive abilities that affects a person's ability to perform activities of daily living, everyday activities. This typically invo ...
, premature mortality arising from physical disorders, and maternal depression impacts on child growth and development. Approximately 76% to 85% of depressed people in low- and middle-income countries do not receive treatment; barriers to treatment include: inaccurate assessment, lack of trained health-care providers,
social stigma Stigma, originally referring to the visible marking of people considered inferior, has evolved to mean a negative perception or sense of disapproval that a society places on a group or individual based on certain characteristics such as their ...
and lack of resources. The stigma comes from misguided societal views that people with mental illness are different from everyone else, and they can choose to get better only if they wanted to. Due to this more than half of the people with depression do not receive help with their disorders. The stigma leads to a strong preference for privacy. An analysis of 40,350 undergraduates from 70 institutions by Posselt and Lipson found that undergraduates who perceived their classroom environments as highly competitive had a 37% higher chance of developing depression and a 69% higher chance of developing anxiety. Several studies have suggested that unemployment roughly doubles the risk of developing depression. The World Health Organization has constructed guidelines – known as The Mental Health Gap Action Programme (mhGAP) – aiming to increase services for people with mental, neurological and substance-use disorders. Depression is listed as one of conditions prioritized by the programme. Trials conducted show possibilities for the implementation of the programme in low-resource primary-care settings dependent on primary-care practitioners and lay health-workers. Examples of mhGAP-endorsed therapies targeting depression include Group Interpersonal Therapy as group treatment for depression and "Thinking Health", which utilizes
cognitive behavioral therapy Cognitive behavioral therapy (CBT) is a form of psychotherapy that aims to reduce symptoms of various mental health conditions, primarily depression, PTSD, and anxiety disorders. Cognitive behavioral therapy focuses on challenging and chang ...
to tackle perinatal depression. Furthermore, effective screening in primary care is crucial for the access of treatments. The mhGAP adopted its approach of improving detection rates of depression by training general practitioners. However, there is still weak evidence supporting this training. According to 2011 study, people who are high in hypercompetitive traits are also likely to measure higher for depression and anxiety.


History

The term ''depression'' was derived from the Latin verb , "to press down". From the 14th century, "to depress" meant to subjugate or to bring down in spirits. It was used in 1665 in English author Richard Baker's ''Chronicle'' to refer to someone having "a great depression of spirit", and by English author
Samuel Johnson Samuel Johnson ( – 13 December 1784), often called Dr Johnson, was an English writer who made lasting contributions as a poet, playwright, essayist, moralist, literary critic, sermonist, biographer, editor, and lexicographer. The ''Oxford ...
in a similar sense in 1753. In Ancient Greece, disease was thought due to an imbalance in the four basic bodily fluids, or ''
humors Humorism, the humoral theory, or humoralism, was a system of medicine detailing a supposed makeup and workings of the human body, adopted by Ancient Greek and Roman physicians and philosophers. Humorism began to fall out of favor in the 17th c ...
''. Personality types were similarly thought to be determined by the dominant humor in a particular person. Derived from the
Ancient Greek Ancient Greek (, ; ) includes the forms of the Greek language used in ancient Greece and the classical antiquity, ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Greek ...
, "black", and , "bile",
melancholia Melancholia or melancholy (from ',Burton, Bk. I, p. 147 meaning black bile) is a concept found throughout ancient, medieval, and premodern medicine in Europe that describes a condition characterized by markedly depressed mood, bodily complain ...
was described as a distinct disease with particular mental and physical symptoms by
Hippocrates Hippocrates of Kos (; ; ), also known as Hippocrates II, was a Greek physician and philosopher of the Classical Greece, classical period who is considered one of the most outstanding figures in the history of medicine. He is traditionally referr ...
in his ''Aphorisms'', where he characterized all "fears and despondencies, if they last a long time" as being symptomatic of the ailment. During the 18th century, the humoral theory of melancholia was increasingly being challenged by mechanical and electrical explanations; references to dark and gloomy states gave way to ideas of slowed circulation and depleted energy. German physician Johann Christian Heinroth, however, argued melancholia was a disturbance of the soul due to moral conflict within the patient. In the 20th century, the German psychiatrist Emil Kraepelin distinguished manic depression. The influential system put forward by Kraepelin unified nearly all types of mood disorder into ''manic–depressive insanity''. Kraepelin worked from an assumption of underlying brain pathology, but also promoted a distinction between
endogenous Endogeny, in biology, refers to the property of originating or developing from within an organism, tissue, or cell. For example, ''endogenous substances'', and ''endogenous processes'' are those that originate within a living system (e.g. an ...
(internally caused) and
exogenous In a variety of contexts, exogeny or exogeneity () is the fact of an action or object originating externally. It is the opposite of endogeneity or endogeny, the fact of being influenced from within a system. Economics In an economic model, an ...
(externally caused) types. Other psycho-dynamic theories were proposed.
Existential Existentialism is a family of philosophical views and inquiry that explore the human individual's struggle to lead an authentic life despite the apparent absurdity or incomprehensibility of existence. In examining meaning, purpose, and value ...
and
humanistic Humanism is a philosophical stance that emphasizes the individual and social potential, and agency of human beings, whom it considers the starting point for serious moral and philosophical inquiry. The meaning of the term "humanism" ha ...
theories represented a forceful affirmation of individualism. Austrian existential psychiatrist
Viktor Frankl Viktor Emil Frankl (; 26 March 1905 – 2 September 1997) was an Austrian neurologist, psychologist, philosopher, and The Holocaust, Holocaust survivor, who founded logotherapy, a school of psychotherapy that describes a search for a life's mean ...
connected depression to feelings of futility and
meaninglessness Meaning most commonly refers to: * Meaning (linguistics), meaning which is communicated through the use of language * Meaning (non-linguistic), a general term of art to capture senses of the word "meaning", independent from its linguistic uses * M ...
. Frankl's
logotherapy Logotherapy is a form of existential therapy developed by neurologist and psychiatrist Viktor Frankl. It is founded on the premise that the primary motivational force of individuals is to find meaning in life. Frankl describes it as "the Third V ...
addressed the filling of an "existential vacuum" associated with such feelings, and may be particularly useful for depressed adolescents. Researchers theorized that depression was caused by a
chemical imbalance The biology of depression is the attempt to identify a biochemical origin of depression, as opposed to theories that emphasize psychological or situational causes. Scientific studies have found that different brain areas show altered activity in ...
in neurotransmitters in the brain, a theory based on observations made in the 1950s of the effects of
reserpine Reserpine is a drug that is used for the treatment of hypertension, high blood pressure, usually in combination with a thiazide diuretic or vasodilator. Large clinical trials have shown that combined treatment with reserpine plus a thiazide diur ...
and
isoniazid Isoniazid, also known as isonicotinic acid hydrazide (INH), is an antibiotic used for the treatment of tuberculosis. For active tuberculosis, it is often used together with rifampicin, pyrazinamide, and either streptomycin or ethambutol. F ...
in altering monoamine neurotransmitter levels and affecting depressive symptoms. During the 1960s and 70s, manic-depression came to refer to just one type of mood disorder (now most commonly known as
bipolar disorder Bipolar disorder (BD), previously known as manic depression, is a mental disorder characterized by periods of Depression (mood), depression and periods of abnormally elevated Mood (psychology), mood that each last from days to weeks, and in ...
) which was distinguished from (unipolar) depression. The terms unipolar and bipolar had been coined by German psychiatrist
Karl Kleist Karl Kleist (born 31 January 1879 in Mulhouse, Alsace, died 26 December 1960) was a German neurologist and psychiatrist who made notable advances in descriptive psychopathology and neuropsychology. Kleist coined the terms unipolar (‘einpolig’) ...
. In July 2022, British psychiatrist Joanna Moncrieff, also psychiatrist Mark Horowtiz and others proposed in a study on academic journal ''
Molecular Psychiatry ''Molecular Psychiatry'' is a peer-reviewed scientific journal published by Nature Publishing Group. It covers research in biological psychiatry. Abstracting and indexing The journal is abstracted and indexed in: According to the ''Journal Cita ...
'' that depression is not caused by a serotonin imbalance in the human body, unlike what most of the psychiatry community points to, and that therefore anti-depressants do not work against the illness. However, such study was met with criticism from some psychiatrists, who argued the study's methodology used an indirect trace of serotonin, instead of taking direct measurements of the molecule. Moncrieff said that, despite her study's conclusions, no one should interrupt their treatment if they are taking any anti-depressant.


See also

* Alain Ehrenberg, French sociologist, author of ''Weariness of the Self: Diagnosing the History of Depression in the Contemporary Age'' * * * * * * * * * *
Dysthymia Dysthymia ( ), known as persistent depressive disorder (PDD) in the DSM-5-TR and dysthymic disorder in ICD-11, is a psychiatric condition marked by symptoms that are similar to those of major depressive disorder, but which persist for at leas ...
*
Major depressive disorder Major depressive disorder (MDD), also known as clinical depression, is a mental disorder characterized by at least two weeks of pervasive depression (mood), low mood, low self-esteem, and anhedonia, loss of interest or pleasure in normally ...


References


External links

* {{Authority control Emotions Neuropsychology Mental states Symptoms or signs involving mood or affect