myoclonic jerk

Main Entry:  myoclonic jerk
Part of Speech:  n
Definition:  an involuntary contraction of a muscle or a group of muscles, as when dropping off to sleep or getting hiccups
Example:  Myoclonic jerks are also a sign of a number of neurological disorders.
Etymology:  1968
Dictionary.com's 21st Century Lexicon
Main Entry:  myoclonic jerk
Part of Speech:  n
Definition:  See hypnagogic jerk
Dictionary.com's 21st Century Lexicon
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