| 释义 |
startle reaction
Thesaurus| Noun | 1. | startle reaction - a complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise); involves flexion of most skeletal muscles and a variety of visceral reactionsstartle responsestartle, jump, start - a sudden involuntary movement; "he awoke with a start" |
startle reaction
startle reaction [stahr´t'l] the various psychophysiological phenomena, including involuntary motor and autonomic reactions, evidenced by an individual in reaction to a sudden, unexpected stimulus, as a loud noise.star·tle re·flexa primitive reflex response observed in the normal newborn but typically suppressed by 3-4 months of age. Any sudden stimulus (for example, a loud noise, a blow to the supporting surface, or being dropped 5-10 cm through space) causes flexion of the hip and knee joints with fanning of the fingers followed by fist clenching and extension of the upper limbs followed by flexion. Synonym(s): Moro reflex, parachute reflex, startle reaction
See also: cochleopalpebral reflex. FinancialSeeReactionstartle reaction
Synonyms for startle reactionnoun a complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise)SynonymsRelated Words |