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
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
Prepulse inhibition — (PPI) is a neurological phenomenon in which a weaker prestimulus (prepulse) inhibits the reaction of an organism to a subsequent strong startling stimulus (pulse). The stimuli are usually acoustic, but tactile, light, airpuff stimuli are also… … Wikipedia
Moro reflex — startle reflex a primitive reflex seen in newborn babies in response to the stimulus of a sudden noise or movement: the baby will fling its arms and legs wide and will appear to stiffen; the arms and legs are then drawn back into flexion. The… … The new mediacal dictionary
Reflex — A reaction that is involuntary. The corneal reflex is the blink that occurs with irritation of the eye. The nasal reflex is a sneeze. * * * 1. An involuntary reaction in response to a stimulus applied to the periphery and transmitted to the… … Medical dictionary
Mauthner cell — The Mauthner Cells are a pair of big and easily identifiable neurons (one for each half of the body) located in the rhombomere 4 of the hindbrain in fish and amphibians that are responsible for a very fast escape reflex (in the majority of… … Wikipedia
animal learning — ▪ zoology Introduction the alternation of behaviour as a result of individual experience. When an organism can perceive and change its behaviour, it is said to learn. That animals can learn seems to go without saying. The cat that… … Universalium