startle response

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Noun1.startle response - 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
startle, jump, start - a sudden involuntary movement; "he awoke with a start"
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References in periodicals archive ?
These paradigms measured different sensory, motor, and autonomic abnormalities of relevance to Rett syndrome, including motor coordination and balance; gait abnormalities; hindlimb clasping, a model of the characteristic hand stereotypies in individuals with Rett syndrome; acoustic startle response; and, in older animals, visual acuity and breathing abnormalities.
The authors flew taxidermied owls on a zip wire to measure the startle response of voles to determine why the white owls were more successful.
If that sound is subsequently repeated several times, we begin to get used to it, and that startle response decreases.
Degree of startle response to a strange object as well as recovery from the startle.
"We suspect that such a highly conspicuous display deployed at close range to a predator will induce a reflexive startle response that will deter predators," the paper said.
Posttraumatic stress disorder (PTSD) can develop after a traumatizing event and frequently results in behavioral changes that overlap in symptomatology with TBI, including cognitive dysfunction, heightened anxiety, and exaggerated startle response [4].
Satterfield, "The acoustic startle response in DBA/2 and C57BL/6 mice: relationship to auditory neuronal response properties and hearing impairment," Hearing Research, vol.
SITUATION: An unintended discharge due to startle response results in tragedy.
Alterations in arousal, such as irritability, angry outbursts, reckless behavior, and exaggerated startle response.