The startle response is an unconscious defensive response to sudden or threatening stimuli.
Startle may also refer to:
Startle display or deimatic behaviour, any pattern of bluffing behaviour in an animal that lacks strong defences Startle syndrome or hyperekplexia, a rare neurologic disorder Fear-potentiated startle, a reflexive physiological reaction to a presented stimulus
See also
Startling (disambiguation) Startle Evoked Movement, the involuntary initiation of a planned action in response to a startling stimuli.