Dorsal motor nucleus equals CN ___

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Prepare for the Lower Motor Apparatus Exam. Explore flashcards and multiple choice questions, with hints and explanations for each. Gear up for your assessment!

Multiple Choice

Dorsal motor nucleus equals CN ___

Explanation:
Dorsal motor nucleus is the parasympathetic motor nucleus of the vagus nerve. Its neurons send preganglionic autonomic fibers that travel with the vagus to innervate thoracic and most of the abdominal viscera. That makes the corresponding cranial nerve the vagus (CN X). The other nuclei listed are associated with somatic or branchial motor functions (for tongue or pharyngeal/laryngeal muscles) or with the accessory system, not with parasympathetic innervation, so they don’t fit as the dorsal motor nucleus.

Dorsal motor nucleus is the parasympathetic motor nucleus of the vagus nerve. Its neurons send preganglionic autonomic fibers that travel with the vagus to innervate thoracic and most of the abdominal viscera. That makes the corresponding cranial nerve the vagus (CN X). The other nuclei listed are associated with somatic or branchial motor functions (for tongue or pharyngeal/laryngeal muscles) or with the accessory system, not with parasympathetic innervation, so they don’t fit as the dorsal motor nucleus.

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