startle reaction

startle reaction
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.

Medical dictionary. 2011.

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  • Startle reaction — The startle reaction, also called the startle response, startle reflex or alarm reaction, is the response of mind and body to a sudden unexpected stimulus, such as a flash of light, a loud noise (acoustic startle reflex), or a quick movement near …   Wikipedia

  • startle reaction — ▪ psychology also called  Startle Pattern,         an extremely rapid psychophysiological response of an organism to a sudden and unexpected stimulus such as a loud sound or a blinding flash of light. In human beings it is characterized by… …   Universalium

  • startle reaction — noun a complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise); involves flexion of most skeletal muscles and a variety of visceral reactions • Syn: ↑startle response • Hypernyms: ↑startle, ↑jump, ↑start * * *… …   Useful english dictionary

  • startle response — noun a complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise); involves flexion of most skeletal muscles and a variety of visceral reactions • Syn: ↑startle reaction • Hypernyms: ↑startle, ↑jump, ↑start * * *… …   Useful english dictionary

  • startle pattern — noun or startle reaction or startle response : the complex of psychophysiological changes that is elicited in an organism by an unexpected sudden stimulus (as a loud noise) and includes tremor, sweating, palpitation, dry mouth, and a feeling of… …   Useful english dictionary

  • reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… …   Medical dictionary

  • Startle reflex — A reflex seen in normal infants in response to a loud noise. The infant with make a sudden body movement, bringing the legs and arms toward the chest. * * * see Moro reflex * * * 1. Moro r. 2. see under reaction …   Medical dictionary

  • Disease, exaggerated startle — A genetic disorder also known as hyperexplexia in which babies have an exaggerated startle reflex (reaction). This disorder was not recognized until 1962 when it was described by Drs. Kok and Bruyn as a disease with the onset at birth of… …   Medical dictionary

  • Disease, startle — A genetic disorder also known as hyperexplexia in which babies have an exaggerated startle reflex (reaction). This disorder was not recognized until 1962 when it was described by Drs. Kok and Bruyn as a disease with the onset at birth of… …   Medical dictionary

  • Exaggerated startle disease — A genetic disorder also known as hyperexplexia in which babies have an exaggerated startle reflex (reaction). This disorder was not recognized until 1962 when it was described by Drs. Kok and Bruyn as a disease with the onset at birth of… …   Medical dictionary

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