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Animal Electricity
Galvanism is a term invented by the late 18th-century physicist and chemist Alessandro Volta to refer to the generation of electric current by chemical action. The term also came to refer to the discoveries of its namesake, Luigi Galvani, specifically the generation of electric current within biological organisms and the contraction/convulsion of biological muscle tissue upon contact with electric current. While Volta theorized and later demonstrated the phenomenon of his "Galvanism" to be replicable with otherwise inert materials, Galvani thought his discovery to be a confirmation of the existence of "animal electricity," a vital force which gave life to organic matter. History According to popular legend, Luigi Galvani discovered the effects of electricity on muscle tissue when investigating an unrelated phenomenon which required skinned frogs in the 1780s and 1790s. His assistant is claimed to have accidentally touched a scalpel to the sciatic nerve of the frog and this result ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giovanni Aldini
Giovanni Aldini (10 April 1762 – 17 January 1834) was an Italian physician and physicist born in Bologna. He was a brother of the statesman Count Antonio Aldini (1756–1826). He graduated in Physic at University of Bologna in 1782. He became professor of experimental physics at University of Bologna in 1798, in succession to his uncle Luigi Galvani (1737–1798). His scientific work was chiefly concerned with galvanism, anatomy and its medical applications, with the construction and illumination of lighthouses, and with experiments for preserving human life and material objects from destruction by fire. He wrote in French and English in addition to his native Italian, and in Latin, still used in the 18th century by the scientific community. In recognition of his merits, the emperor of Austria made him a knight of the Iron Crown and a councillor of state at Milan, where he died. He bequeathed a considerable sum to found a school of natural science for artisans at Bologna. Exp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electroconvulsive Therapy
Electroconvulsive therapy (ECT) is a psychiatry, psychiatric treatment where a generalized seizure (without muscular convulsions) is electrically induced to manage refractory mental disorders.Rudorfer, MV, Henry, ME, Sackeim, HA (2003)"Electroconvulsive therapy". In A Tasman, J Kay, JA Lieberman (eds) ''Psychiatry, Second Edition''. Chichester: John Wiley & Sons Ltd, 1865–1901. Typically, 70 to 120 volts are applied externally to the patient's head, resulting in approximately 800 amperes, milliamperes of direct current passing between the electrodes, for a duration of 100 milliseconds to 6 seconds, either from temple to temple (bilateral ECT) or from front to back of one side of the head (unilateral ECT). However, only about 1% of the electrical current crosses the bony skull into the brain because skull Electrical impedance, impedance is about 100 times higher than skin Electrical impedance, impedance. The ECT procedure was first conducted in 1938 by Italian psychiatrist Ugo C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hallerian Physiology
Hallerian physiology was a theory competing with galvanism in Italy in the late 18th century. It is named after Albrecht von Haller, a Swiss physician who is considered the father of neurology. The Hallerians' fundamental tenet held that muscular movements were produced by a mechanical force, different from life and from the nervous system, and which operated beyond consciousness. The activity of this function could be controlled in dead and dissected animals by touching a metal knife to the muscle fiber or by a spark being discharged on them. The electricity operated only as a stimulus of irritability Irritability (also called as crankiness) is the excitatory ability that living organisms have to respond to changes in their environment. The term is used for both the physiological reaction to stimuli and for the pathological, abnormal or excessi ..., and it was irritability which was the one, true cause of the contractions. Sources The Controversy on Animal Electricity in Eigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrotherapy (cosmetic)
Cosmetic electrotherapy is a range of beauty treatments that uses low electric currents passed through the skin to produce several therapeutic effects such as muscle toning in the body and micro-lifting of the face.Dawn Mernagh-Ward, Jennifer Cartwright, ''Health and beauty therapy: a practical approach for NVQ level 3'', Edition 3, Publisher Nelson Thornes, 2004, , . 420 pagespage 109 It is based on electrotherapy, which has been researched and accepted in the field of rehabilitation, though the "scientific and medical communities have tended to sideline or dismiss the use of electrotherapy for healthy muscles". The use of electricity in cosmetics goes back to the end of the 19th century, almost a hundred years after Luigi Galvani discovered that electricity can make the muscle in a frog's leg twitch (see galvanism). Subsequent research in electrophysiology has been carried out by people such as Robert O. Becker, Dr Björn Nordenström, a former chair of the Nobel Selection Com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrotherapy
Electrotherapy is the use of electrical energy as a medical treatment. In medicine, the term ''electrotherapy'' can apply to a variety of treatments, including the use of electrical devices such as deep brain stimulators for neurological disease. The term has also been applied specifically to the use of electric current to speed wound healing. Additionally, the term "electrotherapy" or "electromagnetic therapy" has also been applied to a range of alternative medical devices and treatments. Medical uses Electrotherapy is primarily used in physical therapy for: * relaxation of muscle spasms * prevention and retardation of disuse atrophy * increase of local blood circulation * muscle rehabilitation and re-education * electrical muscle stimulation * maintaining and increasing range of motion * management of chronic and intractable pain including diabetic neuropathy * acute post-traumatic and post-surgical pain * post-surgical stimulation of muscles to prevent venous thrombosi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioelectromagnetics
Bioelectromagnetics, also known as bioelectromagnetism, is the study of the interaction between electromagnetic fields and biological entities. Areas of study include electromagnetic fields produced by living cells, tissues or organisms, the effects of man-made sources of electromagnetic fields like mobile phones, and the application of electromagnetic radiation toward therapies for the treatment of various conditions. Biological phenomena Bioelectromagnetism is studied primarily through the techniques of electrophysiology. In the late eighteenth century, the Italian physician and physicist Luigi Galvani first recorded the phenomenon while dissecting a frog at a table where he had been conducting experiments with static electricity. Galvani coined the term ''animal electricity'' to describe the phenomenon, while contemporaries labeled it galvanism. Galvani and contemporaries regarded muscle activation as resulting from an electrical fluid or substance in the nerves. Short-liv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrohomeopathy
Electrohomeopathy, Electrohomoeopathy, or Mattei cancer cure is a derivative of homeopathy invented in the 19th century by Count Cesare Mattei. The name is derived from a combination of ''electro'' (referring to an electric bio-energy content supposedly extracted from plants and of therapeutic value, rather than electricity in its conventional sense) and ''homeopathy'' (referring to an alternative medicinal philosophy developed by Samuel Hahnemann in the 18th century). Electrohomeopathy has been defined as the combination of electrical devices and homeopathy. Lucrative for its inventor and popular in the late nineteenth century, electrohomeopathy has been described as "utter idiocy". Like traditional homeopathy, it is regarded by the medical and scientific communities as pseudoscience and its practice as quackery. History and criticism Electrohomeopathy was devised by Cesare Mattei (1809–1896) in the latter part of the 19th century. Mattei, a nobleman living in a castle in the v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrocorticography
Electrocorticography (ECoG), or intracranial electroencephalography (iEEG), is a type of electrophysiological monitoring that uses electrodes placed directly on the exposed surface of the brain to record electrical activity from the cerebral cortex. In contrast, conventional electroencephalography (EEG) electrodes monitor this activity from outside the skull. ECoG may be performed either in the operating room during surgery (intraoperative ECoG) or outside of surgery (extraoperative ECoG). Because a craniotomy (a surgical incision into the skull) is required to implant the electrode grid, ECoG is an invasive procedure. History ECoG was pioneered in the early 1950s by Wilder Penfield and Herbert Jasper, neurosurgeons at the Montreal Neurological Institute. The two developed ECoG as part of their groundbreakinMontreal procedure a surgical protocol used to treat patients with severe epilepsy. The cortical potentials recorded by ECoG were used to identify epileptogenic zones †... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromyography
Electromyography (EMG) is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG is performed using an instrument called an electromyograph to produce a record called an electromyogram. An electromyograph detects the electric potential generated by muscle cells when these cells are electrically or neurologically activated. The signals can be analyzed to detect abnormalities, activation level, or recruitment order, or to analyze the biomechanics of human or animal movement. Needle EMG is an electrodiagnostic medicine technique commonly used by neurologists. Surface EMG is a non-medical procedure used to assess muscle activation by several professionals, including physiotherapists, kinesiologists and biomedical engineers. In Computer Science, EMG is also used as middleware in gesture recognition towards allowing the input of physical action to a computer as a form of human-computer interaction. Clinical uses EMG testing has a variety of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrocardiography
Electrocardiography is the process of producing an electrocardiogram (ECG or EKG), a recording of the heart's electrical activity. It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart using electrodes placed on the skin. These electrodes detect the small electrical changes that are a consequence of cardiac muscle depolarization followed by repolarization during each cardiac cycle (heartbeat). Changes in the normal ECG pattern occur in numerous cardiac abnormalities, including cardiac rhythm disturbances (such as atrial fibrillation and ventricular tachycardia), inadequate coronary artery blood flow (such as myocardial ischemia and myocardial infarction), and electrolyte disturbances (such as hypokalemia and hyperkalemia). Traditionally, "ECG" usually means a 12-lead ECG taken while lying down as discussed below. However, other devices can record the electrical activity of the heart such as a Holter monitor but also s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Major Depressive Disorder
Major depressive disorder (MDD), also known as clinical depression, is a mental disorder characterized by at least two weeks of pervasive low mood, low self-esteem, and loss of interest or pleasure in normally enjoyable activities. Introduced by a group of US clinicians in the mid-1970s, the term was adopted by the American Psychiatric Association for this symptom cluster under mood disorders in the 1980 version of the ''Diagnostic and Statistical Manual of Mental Disorders'' (DSM-III), and has become widely used since. The diagnosis of major depressive disorder is based on the person's reported experiences, behavior reported by relatives or friends, and a mental status examination. There is no laboratory test for the disorder, but testing may be done to rule out physical conditions that can cause similar symptoms. The most common time of onset is in a person's 20s, with females affected about twice as often as males. The course of the disorder varies widely, from one epis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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