paroxysmal
Pronunciation: par-ok-SIZ-mal
Sudden onset and short duration, typically describing neurological symptoms that come and go abruptly.
Full Definition
Paroxysmal describes a pattern of symptom onset characterised by sudden appearance, brief duration, and spontaneous resolution. In neurology, this term commonly applies to various conditions including seizures, movement disorders, pain syndromes, and other neurological phenomena. Paroxysmal events typically have a stereotyped pattern, may be triggered by specific factors, and occur against a background of normal neurological function. Examples include paroxysmal dyskinesias, paroxysmal hemicrania, and paroxysmal vertigo. The paroxysmal nature of symptoms provides important diagnostic clues about underlying pathophysiology and helps distinguish between different neurological conditions.
Usage
Usage note: Emphasises the sudden, brief, and recurrent nature of neurological phenomena.
In Context
- "The patient described paroxysmal episodes of severe right-sided facial pain lasting seconds." — Trigeminal neuralgia assessment
- "Paroxysmal kinesigenic dyskinesia was triggered by sudden voluntary movements." — Movement disorder clinic notes