Startle-evoked movement (SEM or startReact) is the involuntary initiation of a planned action in response to a startling stimulus. While the classic startle reflex involves involuntary protective movements, SEMs can be a variety of arm, hand and leg actions including wrist flexion, and rising onto tiptoes.
Startle-evoked movement (SEM or startReact) is the involuntary initiation of a planned action in response to a startling stimulus. While the classic startle reflex involves involuntary protective movements, SEMs can be a variety of arm, hand and leg actions including wrist flexion, and rising onto tiptoes.
Source: Wikipedia "Startle-evoked movement" · CC BY-SA 4.0
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