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Physiology Special Senses 0222d03a

Which of the following nuclei is involved in both light reflex and accomodation reflex?

A
Pretectal nucleus
B
Edinger - Westphal nucleus
C
Suprachiasmatic nucleus
D
Supraoptic nucleus
High-Yield Explanation
Explanation: - Pupillary light reflex: Visual pathway - pretectal nucleus - Edinger Westphal nucleus - constriction of the pupil. NOTE: Pretectal nucleus is connected to E-W nucleus bilaterally, causing contralateral pupil to also constrict (indirect light reflex). Accommodation reaction: Visual pathway - visual coex (blurred image of a near object) - E-W nucleus - changes of accommodation.

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