Epilepsy, Jacksonian
A brief alteration in movement, sensation or nerve function caused by abnormal electrical activity in a localized area of the brain. Seizures of this type typically cause no change in awareness or alertness. They are transient, fleeting, ephemeral. Jacksonian seizures are extremely varied and may involve, for example, apparently purposeful movements such as turning the head, eye movements, smacking the lips, mouth movements, drooling, rhythmic muscle contractions in a part of the body, abnormal numbness, tingling, and a crawling sensation over the skin. Jacksonian seizures are a form of epilepsy. These seizures are named for an English neurologist, John Hughlings Jackson, who studied speech defects in brain disorders and confirmed the location in the brain of the speech center ("Broca's center"). He described what are today called Jacksonian seizures in 1863 and in 1875 found the areas in the brain that caused them. Jackson was among the towering figures of 19th-century medicine, one of "the great men of medicine." (There were few, if any, women in medicine in the 19th century.)

Medical dictionary. 2011.

Look at other dictionaries:

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  • jacksonian — Described by John Hughlings Jackson. See j. epilepsy, j. seizure. * * * jack·so·ni·an jak sō nē ən adj, often cap of, relating to, associated with, or resembling Jacksonian epilepsy Jack·son jak sən John Hughlings (1835 1911) British neurologist …   Medical dictionary

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  • epilepsy — Synonyms and related words: Jacksonian epilepsy, MS, Rolandic epilepsy, abdominal epilepsy, access, acquired epilepsy, activated epilepsy, affect epilepsy, akinetic epilepsy, amyotrophic lateral sclerosis, apoplexy, arrest, attack, autonomic… …   Moby Thesaurus

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  • epilepsy — n. a disorder of brain function characterized by recurrent seizures that have a sudden onset. The term idiopathic is used to describe epilepsy that is not associated with structural damage to the brain. Seizures may be generalized or partial.… …   The new mediacal dictionary

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