The following findings in humans are consistent with the startle reflex . A startle response is normally seen in children and adults in response to sudden.
Arching of the head (exaggerated head-retraction reflex or HRR), spastic jerking In children and adults, intensity of the startle response may be affected by.
In animals, including humans, the startle response is a largely unconscious defensive response to sudden or threatening stimuli, such as sudden noise or sharp.