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James–Lange Theory
The James–Lange theory is a hypothesis on the origin and nature of emotions and is one of the earliest theories of emotion within modern psychology. It was developed by philosopher John Dewey and named for two 19th-century scholars, William James and Carl Lange (see modern criticism for more on the theory's origin). The basic premise of the theory is that physiological arousal instigates the experience of emotion. Instead of feeling an emotion and subsequent physiological (bodily) response, the theory proposes that the physiological change is primary, and emotion is then experienced when the brain reacts to the information received via the body's nervous system. It proposes that each specific category of emotion is attached to a unique and different pattern of physiological arousal and emotional behavior in reaction due to an exciting stimulus. The theory has been criticized and modified over the course of time, as one of several competing theories of emotion. Modern theorists h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emotion
Emotions are mental states brought on by neurophysiological changes, variously associated with thoughts, feelings, behavioral responses, and a degree of pleasure or displeasure. There is currently no scientific consensus on a definition. Emotions are often intertwined with mood, temperament, personality, disposition, or creativity. Research on emotion has increased over the past two decades with many fields contributing including psychology, medicine, history, sociology of emotions, and computer science. The numerous theories that attempt to explain the origin, function and other aspects of emotions have fostered more intense research on this topic. Current areas of research in the concept of emotion include the development of materials that stimulate and elicit emotion. In addition, PET scans and fMRI scans help study the affective picture processes in the brain. From a mechanistic perspective, emotions can be defined as "a positive or negative experience that is as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Nervous System
The central nervous system (CNS) is the part of the nervous system consisting primarily of the brain and spinal cord. The CNS is so named because the brain integrates the received information and coordinates and influences the activity of all parts of the bodies of bilaterally symmetric and triploblastic animals—that is, all multicellular animals except sponges and diploblasts. It is a structure composed of nervous tissue positioned along the rostral (nose end) to caudal (tail end) axis of the body and may have an enlarged section at the rostral end which is a brain. Only arthropods, cephalopods and vertebrates have a true brain (precursor structures exist in onychophorans, gastropods and lancelets). The rest of this article exclusively discusses the vertebrate central nervous system, which is radically distinct from all other animals. Overview In vertebrates, the brain and spinal cord are both enclosed in the meninges. The meninges provide a barrier to chemicals dissolv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Pan
Peter Pan is a fictional character created by List of Scottish novelists, Scottish novelist and playwright J. M. Barrie. A free-spirited and mischievous young boy who can fly and Puer aeternus, never grows up, Peter Pan spends his never-ending childhood having adventures on the mythical island of Neverland as the leader of the Lost Boys (Peter Pan), Lost Boys, interacting with Fairy, fairies, Piracy, pirates, mermaids, Native Americans in the United States, Native Americans, and occasionally ordinary children from the world outside Neverland. Peter Pan has become a cultural icon symbolizing youthful innocence and escapism. In addition to two distinct works by Barrie, ''The Little White Bird'' (1902, with chapters 13–18 published in ''Peter Pan in Kensington Gardens'' in 1906), and the West End theatre, West End stage play ''Peter and Wendy, Peter Pan; or, the Boy Who Wouldn't Grow Up'' (1904, which expanded into the 1911 novel ''Peter and Wendy''), the character has been featu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Little White Bird
''The Little White Bird'' is a novel by the Scottish writer J. M. Barrie, ranging in tone from fantasy and whimsy to social comedy with dark, aggressive undertones. It was published in November 1902, by Hodder & Stoughton in the UK and Scribner's in the US (and the latter also published it serially in the monthly '' Scribner's Magazine'' from August to November). The book attained prominence and longevity thanks to several chapters written in a softer tone than the rest of the book, which introduced the character and mythology of Peter Pan. In 1906, those chapters were published separately as a children's book, ''Peter Pan in Kensington Gardens''. The Peter Pan story began as one chapter and grew to an "elaborate book-within-a-book" of more than one hundred pages during the four years Barrie worked on ''The Little White Bird''. The complete book has also been published under the title ''The Little White Bird, or Adventures in Kensington Gardens''. Plot introduction ''The L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bronchioles
The bronchioles or bronchioli (pronounced ''bron-kee-oh-lee'') are the smaller branches of the bronchial airways in the lower respiratory tract. They include the terminal bronchioles, and finally the respiratory bronchioles that mark the start of the respiratory zone delivering air to the gas exchanging units of the alveoli. The bronchioles no longer contain the cartilage that is found in the bronchi, or glands in their submucosa. Structure The pulmonary lobule is the portion of the lung ventilated by one bronchiole. Bronchioles are approximately 1 mm or less in diameter and their walls consist of ciliated cuboidal epithelium and a layer of smooth muscle. Bronchioles divide into even smaller bronchioles, called ''terminal'', which are 0.5 mm or less in diameter. Terminal bronchioles in turn divide into smaller respiratory bronchioles which divide into alveolar ducts. Terminal bronchioles mark the end of the conducting division of air flow in the respiratory syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blood Vessels
The blood vessels are the components of the circulatory system that transport blood throughout the human body. These vessels transport blood cells, nutrients, and oxygen to the tissues of the body. They also take waste and carbon dioxide away from the tissues. Blood vessels are needed to sustain life, because all of the body's tissues rely on their functionality. There are five types of blood vessels: the arteries, which carry the blood away from the heart; the arterioles; the capillaries, where the exchange of water and chemicals between the blood and the tissues occurs; the venules; and the veins, which carry blood from the capillaries back towards the heart. The word ''vascular'', meaning relating to the blood vessels, is derived from the Latin ''vas'', meaning vessel. Some structures – such as cartilage, the epithelium, and the lens and cornea of the eye – do not contain blood vessels and are labeled ''avascular''. Etymology * artery: late Middle English; from Latin ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympathetic Nervous System
The sympathetic nervous system (SNS) is one of the three divisions of the autonomic nervous system, the others being the parasympathetic nervous system and the enteric nervous system. The enteric nervous system is sometimes considered part of the autonomic nervous system, and sometimes considered an independent system. The autonomic nervous system functions to regulate the body's unconscious actions. The sympathetic nervous system's primary process is to stimulate the body's fight or flight response. It is, however, constantly active at a basic level to maintain homeostasis. The sympathetic nervous system is described as being antagonistic to the parasympathetic nervous system which stimulates the body to "feed and breed" and to (then) "rest-and-digest". Structure There are two kinds of neurons involved in the transmission of any signal through the sympathetic system: pre-ganglionic and post-ganglionic. The shorter preganglionic neurons originate in the thoracolumbar division o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gregorio Marañón
Gregorio Marañón y Posadillo, OWL (19 May 1887 in Madrid – 27 March 1960 in Madrid) was a Spanish physician, scientist, historian, writer and philosopher. He married Dolores Moya in 1911, and they had four children (Carmen, Belén, María Isabel and Gregorio). Life and work An austere, humanist and liberal man, he is considered one of the most brilliant Spanish intellectuals of the 20th century. Besides his erudition, he also stands out for his elegant literary style. As many other thinkers of his time, he involved himself socially and politically: he was a Republican and fought the Miguel Primo de Rivera dictatorship (he was condemned to jail for a month) and showed his disagreement with Spanish communism. Moreover, he supported the Second Spanish Republic in its beginnings, but later criticised it because of its lack of cohesion among the Spanish people. Probably after going away from Madrid Madrid ( , ) is the capital and most populous city of Spain. The city ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salivary Gland
The salivary glands in mammals are exocrine glands that produce saliva through a system of ducts. Humans have three paired major salivary glands (parotid, submandibular, and sublingual), as well as hundreds of minor salivary glands. Salivary glands can be classified as serous, mucous, or seromucous (mixed). In serous secretions, the main type of protein secreted is alpha-amylase, an enzyme that breaks down starch into maltose and glucose, whereas in mucous secretions, the main protein secreted is mucin, which acts as a lubricant. In humans, 1200 to 1500 ml of saliva are produced every day. The secretion of saliva (salivation) is mediated by parasympathetic stimulation; acetylcholine is the active neurotransmitter and binds to muscarinic receptors in the glands, leading to increased salivation. The fourth pair of salivary glands, the tubarial glands discovered in 2020, are named for their location, being positioned in front and over the torus tubarius. However, this find ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chorda Tympani
The chorda tympani is a branch of the facial nerve that originates from the taste buds in the front of the tongue, runs through the middle ear, and carries taste messages to the brain. It joins the facial nerve (cranial nerve VII) inside the facial canal, at the level where the facial nerve exits the skull via the stylomastoid foramen, but exits through the petrotympanic fissure and descends in the infratemporal fossa. The chorda tympani is part of one of three cranial nerves that are involved in taste. The taste system involves a complicated feedback loop, with each nerve acting to inhibit the signals of other nerves. Structure The chorda tympani exits the cranial cavity through the internal acoustic meatus along with the facial nerve, then it travels through the middle ear, where it runs from posterior to anterior across the tympanic membrane. It passes between the malleus and the incus, on the medial surface of the neck of the malleus. The nerve continues through the petro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Newport Langley
John Newport Langley (2 November 1852 – 5 November 1925) was a British physiologist, who made substantive discoveries about the nervous system and secretion. Life He was born in Newbury, Berkshire the son of John Langley, the local schoolmaster, and his wife, Mary Groom. He was educated at Exeter Grammar School in Devon. In 1871 he won a place at St John's College, Cambridge, where he graduated MA before continuing multiple postgraduate studies, gaining several doctorates. He spent his entire career at Cambridge University, beginning as a Demonstrator in lectures in 1875. He began lecturing in Physiology in 1884 and was awarded a professorship in 1903, succeeding Prof Michael Foster. He was elected a Fellow of the Royal Society in 1883 and later its vice-president. He was made an Honorary Fellow of the Royal Society of Edinburgh in 1916. Langley is known as one of the fathers of the chemical receptor theory, and as the origin of the concept of "receptive substance". In 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adrenaline
Adrenaline, also known as epinephrine, is a hormone and medication which is involved in regulating visceral functions (e.g., respiration). It appears as a white microcrystalline granule. Adrenaline is normally produced by the adrenal glands and by a small number of neurons in the medulla oblongata. It plays an essential role in the fight-or-flight response by increasing blood flow to muscles, heart output by acting on the SA node, pupil dilation response, and blood sugar level. It does this by binding to alpha and beta receptors. It is found in many animals, including humans, and some single-celled organisms. It has also been isolated from the plant ''Scoparia dulcis'' found in Northern Vietnam. Medical uses As a medication, it is used to treat several conditions, including allergic reaction anaphylaxis, cardiac arrest, and superficial bleeding. Inhaled adrenaline may be used to improve the symptoms of croup. It may also be used for asthma when other treatments are not eff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
