Biology High School

Which brain structure is responsible for the "startle reflex" in response to a bright flash of light?
a. Vestibular apparatus
b. Basal nuclei
c. Cerebellum
d. Superior colliculus
e. Inferior colliculus

Answers

Answer 1

Superior colliculus is responsible for the "startle reflex" in response to a bright flash of light so option d is correct.

The startle reflex is a rapid, involuntary movement in response to sudden, intense stimuli such as a loud noise or bright flash of light. The superior colliculus, located in the midbrain, is responsible for mediating this reflex by rapidly relaying sensory information to motor centers in the brainstem. The superior colliculus receives input from various sensory modalities, including auditory and visual, and integrates this information to generate a rapid, coordinated response. This reflex helps to protect the organism from potential harm by allowing it to quickly respond to sudden, unexpected stimuli.

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