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NBDE Quiz # 63
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1. Question
The levator veli palatini muscle is primarily innervated by the:
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The correct response is D. The levator veli palatini muscle comprises a muscular sling in the posterior palate that is essential for effective palatal closure. It arises embryologically from the fourth pharyngeal arch and, therefore, is innervated by the pharyngeal plexus, a derivative of the vagus (X) nerve. This nerve also innervates several other muscles that figure prominently in speech development: the pharyngeal constrictors, the musculus uvulae, the palatoglossus, and palatopharyngeus. The trigeminal (V) nerve has three separate
The first branch, the ophthalmic division, is purely sensory as is the second division. The second, or maxillary, division is intermediate in size between the first and third divisions. The mandibular branch of the trigeminal nerve, the third division, is the largest branch and contains both sensory and motor nerves. Developmentally, the third division is a nerve of the first branchial (or mandibular) arch and provides motor innervation to the muscular derivatives of this arch, including the temporal, masseter, pterygoids, mylohyoid, tensor tym- pani, and the anterior belly of the digastric. The facial (VII) nerve provides motor innervation to the muscles of facial animation, including the buccinators. The hypoglossal (XII) nerve provides motor innervation to the tongue.Incorrect
The correct response is D. The levator veli palatini muscle comprises a muscular sling in the posterior palate that is essential for effective palatal closure. It arises embryologically from the fourth pharyngeal arch and, therefore, is innervated by the pharyngeal plexus, a derivative of the vagus (X) nerve. This nerve also innervates several other muscles that figure prominently in speech development: the pharyngeal constrictors, the musculus uvulae, the palatoglossus, and palatopharyngeus. The trigeminal (V) nerve has three separate
The first branch, the ophthalmic division, is purely sensory as is the second division. The second, or maxillary, division is intermediate in size between the first and third divisions. The mandibular branch of the trigeminal nerve, the third division, is the largest branch and contains both sensory and motor nerves. Developmentally, the third division is a nerve of the first branchial (or mandibular) arch and provides motor innervation to the muscular derivatives of this arch, including the temporal, masseter, pterygoids, mylohyoid, tensor tym- pani, and the anterior belly of the digastric. The facial (VII) nerve provides motor innervation to the muscles of facial animation, including the buccinators. The hypoglossal (XII) nerve provides motor innervation to the tongue.
