| Jackson, John Hughlings | <person> English neurologist, 1835-1911. See: jacksonian epilepsy, Jackson's law, Jackson's rule, Jackson's sign. (05 Mar 2000) |
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| jacksonian | Described by John Hughlings Jackson. See: jacksonian epilepsy, Jacksonian seizure. (05 Mar 2000) |
| jacksonian epilepsy | A brief temporary alteration in movement, sensation or autonomic nerve function caused by abnormal electrical activity in a localised area of the brain. Focal seizures (i.e. Partial or Jacksonian seizures) usually cause no change in awareness or alertness. An example of a focal (partial) seizure would be rhythmic muscle contractions in one area of the body: lip smacking, mouth movements, drooling, head turning, eye movements or seemingly purposeful movements (for example picking at clothes). Other presentations may be strictly sensory with abnormal numbness, tingling or a crawling sensation to the skin. More unusual symptoms include changes in speech, thought, personality, mood, sensation of deja vu or hallucinations. (27 Sep 1997) |
| Jacksonian seizure | A brief temporary alteration in movement, sensation or autonomic nerve function caused by abnormal electrical activity in a localised area of the brain. Focal seizures (i.e. Partial or Jacksonian seizures) usually cause no change in awareness or alertness. An example of a focal (partial) seizure would be rhythmic muscle contractions in one area of the body: lip smacking, mouth movements, drooling, head turning, eye movements or seemingly purposeful movements (for example picking at clothes). Other presentations may be strictly sensory with abnormal numbness, tingling or a crawling sensation to the skin. More unusual symptoms include changes in speech, thought, personality, mood, sensation of deja vu or hallucinations. (27 Sep 1997) |
| jackstone bladder calculus | <radiology> Spiculated calculus in urinary bladder, calcium oxalate monohydrate (12 Dec 1998) |
| jackstraw | 1. An effigy stuffed with straw; a scarecrow; hence, a man without property or influence. 2. One of a set of straws of strips of ivory, bone, wood, etc, for playing a child's game, the jackstraws being thrown confusedly together on a table, to be gathered up singly by a hooked instrument, without touching or disturbing the rest of the pile. See Spilikin. Source: Websters Dictionary (01 Mar 1998) |
| jackwood | Wood of the jack (Artocarpus integrifolia), used in cabinetwork. Source: Websters Dictionary (01 Mar 1998) |