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1. sudden fall without precipitant or associated symptoms or signs, generally in old people with normal electroencephalograms; of unknown cause;
2. atonic seizure.
Farlex Partner Medical Dictionary © Farlex 2012
Aetiology Idiopathic—most common in older women and attributed to age-related defects in reflexes; drop attacks also occur in vertibrobasilar ischaemia, acute labyrinthine vertigo, cataplexy, and ‘plateau waves’, and may be associated with loss of consciousness in syncope and seizures
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
drop attackNeurology An episodic and precipitous loss of motor function, where the victim is either standing or walking, and abruptly plummets, fully conscious to the floor, as the legs give way; idiopathic DAs are most common in older ♀, and attributed to age-related defects in reflexes; DAs may also occur in vertibrobasilar ischemia, acute labyrinthine vertigo, cataplexy, 'plateau waves'; DAs with loss of consciousness occur in syncope and seizures
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
drop at·tack(drop ă-tak')
An episode of sudden falling that occurs during standing or walking, without warning and without loss of consciousness. The patients are usually elderly and have normal findings on electroencephalograms.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
drop attackA tendency to fall suddenly, without warning, and without loss of consciousness. Drop attacks may be due to a temporary shortage of blood to the brain and should be investigated.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005