true – facial nerve (CN VII) providesmotor innervation for muscles offacial expression (SVE)visceromotor innervation forsalivary glands and lacrimal glands(GVE)taste input (SVA) and sensation fromexternal ear (GSA)
The facial nerve is a mixed cranial nerve. True or False?
Yes, that statement is true. The facial nerve (CN VII) has a mixed function as it provides motor innervation, visceromotor innervation, and sensory innervation.
The motor function of CN VII involves the muscles of facial expression, which includes the muscles of the forehead, cheeks, lips, and eyelids. These muscles are important for expressing emotions and communicating nonverbal cues.
The visceromotor function involves the parasympathetic fibers that innervate the salivary glands and lacrimal glands. The salivary glands produce saliva and the lacrimal glands produce tears. Activation of these glands is important for maintaining oral hygiene and lubricating the eyes.
The facial nerve also provides sensory functions. It carries taste input from the anterior two-thirds of the tongue (SVA) and provides sensation from the external ear (GSA). In addition, it supplies a small area of skin on the posterior surface of the external ear.
Overall, the facial nerve is an important cranial nerve that has a mixed function and plays a crucial role in facial expression, salivation, tear production, taste sensation, and sensory innervation of the external ear.
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