📖 what
What is the startle reflex?
PsychologyBrainstem
Quick Answer
The startle reflex is a rapid, automatic response to a sudden unexpected stimulus such as a loud noise. It is mediated by brainstem circuits and happens in fractions of a second.
The Full Story
The startle reflex is one of the fastest defensive reactions in the nervous system. In humans it often includes blinking, tensing muscles, and a quick body movement after a sudden sound or flash. Because it is so fast, it is useful for studying basic sensorimotor processing and emotional state. Researchers also measure how the reflex changes with fear, stress, or anticipation.
Key Facts
1.Triggered by sudden stimuli like loud sounds
2.Involves very fast brainstem pathways
3.Often measured by the eye-blink response
YouTube Angle
Suggested video title for this topic:
"Why your body jumps before you’ve even had time to think."