Which branch of CN V provides motor innervation?

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Study for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Prepare using flashcards and multiple choice questions. Get ready for your exam with hints and explanations for each question!

Multiple Choice

Which branch of CN V provides motor innervation?

Explanation:
The branch that provides motor innervation is the mandibular division. The ophthalmic (V1) and maxillary (V2) divisions carry only sensory fibers to the face, while the mandibular division (V3) contains motor fibers that innervate the muscles of mastication (masseter, temporalis, and the pterygoids) and a few other muscles like the mylohyoid and the anterior belly of the digastric. So motor innervation from CN V comes specifically through the mandibular division.

The branch that provides motor innervation is the mandibular division. The ophthalmic (V1) and maxillary (V2) divisions carry only sensory fibers to the face, while the mandibular division (V3) contains motor fibers that innervate the muscles of mastication (masseter, temporalis, and the pterygoids) and a few other muscles like the mylohyoid and the anterior belly of the digastric. So motor innervation from CN V comes specifically through the mandibular division.

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