#startle__jump__start  a sudden involuntary movement: "he awoke with a start"
  supertype:  unconditioned_reflex__unconditionedreflex__reflex__instinctive_reflex__instinctivereflex__innate_reflex__inborn_reflex__physiological_reaction__physiologicalreaction  an automatic instinctive unlearned reaction to a stimulus
  subtype:  startle_response__startleresponse__startle_reaction__startlereaction  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
  subtype:  startle_reflex__startlereflex__Moro_reflex  a normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs
  subtype:  flinch__wince  a reflex response to sudden pain

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