![]() ![]() Preganglionic parasympathetic motor neurons ( third-order ): efferent limb arises from Edinger-Westphal nucleus → oculomotor nerve ( CN III) → ciliary ganglion.Internuncial neurons ( second-order ): Fibers from each pretectal nucleus innervate both the ipsilateral and contralateral Edinger-Westphal nuclei.Fibers from the nasal half of the retina crossover → contralateral optic tract → contralateral pretectal nucleus. ![]()
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