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.

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1. Moro r. 2. see under reaction.

Medical dictionary. 2011.

Look at other dictionaries:

  • startle reflex — noun a normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs • Syn: ↑Moro reflex • Hypernyms: ↑startle, ↑jump, ↑start …   Useful english dictionary

  • startle reflex — see Moro reflex …   The new mediacal dictionary

  • 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

  • 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

  • Reflex — For other uses, see Reflex (disambiguation). A reflex action, also known as a reflex, is an involuntary and nearly instantaneous movement in response to a stimulus.[1] A true reflex is a behavior which is mediated via the reflex arc; this does… …   Wikipedia

  • reflex action — noun an automatic instinctive unlearned reaction to a stimulus • Syn: ↑reflex, ↑reflex response, ↑instinctive reflex, ↑innate reflex, ↑inborn reflex, ↑unconditioned reflex, ↑physiological reaction …   Useful english dictionary

  • reflex response — noun an automatic instinctive unlearned reaction to a stimulus • Syn: ↑reflex, ↑reflex action, ↑instinctive reflex, ↑innate reflex, ↑inborn reflex, ↑unconditioned reflex, ↑physiological reaction …   Useful english dictionary

  • 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

  • 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

  • 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

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