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Galvanism
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 res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luigi Galvani
Luigi Galvani (, also ; ; la, Aloysius Galvanus; 9 September 1737 – 4 December 1798) was an Italian physician, physicist, biologist and philosopher, who studied animal electricity. In 1780, he discovered that the muscles of dead frogs' legs twitched when struck by an electrical spark. This was an early study of bioelectricity, following experiments by John Walsh and Hugh Williamson. Early life Luigi Galvani was born to Domenico Galvani and Barbara Caterina Foschi, in Bologna, then part of the Papal States. Domenico was a goldsmith. Galvani then began taking an interest in the field of "medical electricity". This field emerged in the middle of the 18th century, following electrical researches and the discovery of the effects of electricity on the human body by scientists including Bertrand Bajon and Ramón M. Termeyer in the 1760s, and by John Walsh and Hugh Williamson in the 1770s. Galvani vs. Volta Alessandro Volta, a professor of experimental physics in the Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alessandro Volta
Alessandro Giuseppe Antonio Anastasio Volta (, ; 18 February 1745 – 5 March 1827) was an Italian physicist, chemist and lay Catholic who was a pioneer of electricity and power who is credited as the inventor of the electric battery An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negati ... and the discoverer of methane. He invented the voltaic pile in 1799, and reported the results of his experiments in 1800 in a two-part letter to the president of the Royal Society. With this invention Volta proved that electricity could be generated chemically and debunked the prevalent theory that electricity was generated solely by living beings. Volta's invention sparked a great amount of scientific excitement and led others to conduct similar experiments, which eventually led to the develop ... [...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] |
George Forster (murderer)
George Forster (or Foster) was found guilty of murdering his wife and child by drowning them in Paddington Canal, London. He was hanged at Newgate on 18 January 1803, shortly after which his body was taken to a nearby house where it was used in an experiment by Italian scientist Giovanni Aldini. At his trial the events were reconstructed. Forster's mother-in-law recounted that her daughter and grandchild had left her house to see Forster at 4 p.m. on Saturday, 4 December 1802. Joseph Bradfield, in whose house Forster lodged, reported that they had stayed together that night and gone out at 10 a.m. on the Sunday morning. He also stated that Forster and his wife had not been on good terms because she wished to live with him. Various witnesses saw Forster with his wife and child in public houses near Paddington Canal during the day on the Sunday. The body of his child was found on the Monday morning; after the canal was dragged for three days, his wife's body was also found. Forst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frankenstein
''Frankenstein; or, The Modern Prometheus'' is an 1818 novel written by English author Mary Shelley. ''Frankenstein'' tells the story of Victor Frankenstein, a young scientist who creates a sapient creature in an unorthodox scientific experiment. Shelley started writing the story when she was 18, and the first edition was published anonymously in London on 1 January 1818, when she was 20. Her name first appeared in the second edition, which was published in Paris in 1821. Shelley travelled through Europe in 1815, moving along the river Rhine in Germany, and stopping in Gernsheim, away from Frankenstein Castle, where, two centuries before, an alchemist had engaged in experiments.This seems to mean Johann Konrad Dippel (1673–1734), one century before (not two). For Dippel's experiments and the possibility of connection to ''Frankenstein'' see the Dippel article. She then journeyed to the region of Geneva, Switzerland, where much of the story takes place. Galvanism ... [...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 e ... [...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 excess ..., and it was irritability which was the one, true cause of the contractions. Sources The Controversy on Animal Electricity in Eig ... [...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 thrombos ... [...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 ... [...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 zone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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