What is the classification of the facial nerve in terms of function?

The facial nerve, also known as cranial nerve VII, is classified as both sensory and motor because it has multiple functions that involve different types of nerve fibers.

Motorically, the facial nerve innervates the muscles of facial expression, allowing for movements such as smiling, frowning, and blinking. This motor function is essential for a range of facial expressions and plays a crucial role in nonverbal communication.

Sensory functions of the facial nerve include the taste sensations from the anterior two-thirds of the tongue. It also carries sensory information from the external ear and the tympanic membrane. This dual role highlights the nerve's complexity and its involvement in both voluntary movements and sensory processing.

Thus, the classification of the facial nerve as both sensory and motor accurately reflects its diverse functional contributions to the nervous system.