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"
References in periodicals archive ?
Startle response resulting in unintended discharge is also a very real possibility.
If a weaker stimulus is emitted beforehand as a "prepulse," the startle response is lower.
Interestingly, the startle response of the insect was completely stifled, and it continued its pace despite observation by the authors.
If infants do not learn that the world is safe, and to understand sensory input, they will retain these reflexes as a primary reaction to danger, or perceived danger, and will not develop a good adult startle response that will allow them to realistically understand sensory information and their safe place in the world.
These findings are relevant to our understanding of functional stability in patients with OT because the central neurological pathways that mediate the acoustic startle response are believed to involve centers within the brainstem that are responsible for postural control.
People who develop ASD could suffer from depression, anxiety, hyper vigilance, exaggerated startle response, invasive thoughts, among others.
To be eligible for the trial, participants were screened to confirm that they were currently experiencing at least one of the following PTSD symptoms: re-experiencing of trauma via flashbacks, nightmares, intrusive thoughts, exaggerated emotional responses to trauma, emotional numbness, insomnia, irritability, exaggerated startle response, or avoidance of people or places that remind them of the trauma.
Muscle tone was permanently increased, as indicated by tetanus-like erection of the ears and by a violent but brief startle response to the slightest acoustic or tactile stimulation (Figure).
First, the authors provide an evaluation of the use of video demonstration of the habitation of a startle response in a college classroom.
The saki scream that we heard was a startle response because it was given at the moment of attack, it was very loud (conspicuous), and it is rare.
When moths react to the ultrasound produced by bats (Order Chiroptera), this evading behavior can be classified as an acoustic startle response (Hoy et al.
Individual experiences include depression, anxiety, hyper-vigilance and an exaggerated startle response," he added.