Question

The patient's pattern of sensitivity suggests that which of the following nerves is involved?

A) CN V1
B) CN V2
C) CN V3
D) Zygomatic branch of CN VII
E) Buccal branch of CN II

Answer 1

The patient’s pattern of sensitivity being evaluated is associated with cranial nerves; the trigeminal nerve branches (CN V1, CN V2, CN V3) and the facial nerve's zygomatic branch (CN VII) could be relevant depending on the location of sensitivity. The optic nerve (CN II) is unrelated as it's involved in vision.

Step-by-step explanation:

The question refers to the pattern of sensitivity in a patient which is associated with different cranial nerves. The trigeminal nerve (CN V) is broken into three branches, with CN V1 being the ophthalmic branch, CN V2 the maxillary branch, and CN V3 the mandibular branch. If the pattern of sensitivity under consideration is in areas typically innervated by the trigeminal nerve, choosing between CN V1, CN V2, or CN V3 will depend on the specific location of the sensitivity. The facial nerve (CN VII) affects muscle movement but also has sensory branches, such as the zygomatic branch that would be involved in facial sensations, and also carries preganglionic parasympathetic fibers.

A nerve such as the buccal branch of CN II is not plausible since CN II is the optic nerve and is involved with vision rather than facial sensations or muscle movements. Cranial nerves like the glossopharyngeal (CN IX) and vagus (CN X) nerves.