Seizure, Jacksonian
A form of epilepsy involving 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. 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.

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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

  • Seizure — Uncontrolled electrical activity in the brain, which may produce a physical convulsion, minor physical signs, thought disturbances, or a combination of symptoms. The type of symptoms and seizures depend on where the abnormal electrical activity… …   Medical dictionary

  • Jacksonian seizure — A form of epilepsy involving 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… …   Medical dictionary

  • seizure — Synonyms and related words: Jacksonian epilepsy, Rolandic epilepsy, abdominal epilepsy, abduction, abscess, access, accession, acquired epilepsy, activated epilepsy, acute pain, adoption, affect epilepsy, ague, akinetic epilepsy, amok, anemia,… …   Moby Thesaurus

  • Jacksonian seizure — noun Seizures characteristic of certain forms of epilepsy …   Wiktionary

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