What is the function of the Edinger-Westphal nucleus?

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Multiple Choice

What is the function of the Edinger-Westphal nucleus?

Explanation:
The Edinger-Westphal nucleus is the parasympathetic origin of the oculomotor nerve, sending preganglionic fibers to the ciliary ganglion. From there, postganglionic fibers innervate the sphincter pupillae muscle, producing pupil constriction and enabling the pupillary light reflex as well as aiding accommodation by influencing the ciliary muscle. This makes pupil constriction the correct function. Dilation is driven by the sympathetic system, while eye movements come from the motor neurons of the oculomotor nucleus, not this parasympathetic center, and hearing involves the auditory pathways.

The Edinger-Westphal nucleus is the parasympathetic origin of the oculomotor nerve, sending preganglionic fibers to the ciliary ganglion. From there, postganglionic fibers innervate the sphincter pupillae muscle, producing pupil constriction and enabling the pupillary light reflex as well as aiding accommodation by influencing the ciliary muscle. This makes pupil constriction the correct function. Dilation is driven by the sympathetic system, while eye movements come from the motor neurons of the oculomotor nucleus, not this parasympathetic center, and hearing involves the auditory pathways.

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