New Jersey Esthetics Practice Exam 2025 – Complete Test Prep

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Which nerve is referred to as the motor nerve of neck muscles?

Hypoglossal Nerve

Accessory Nerve

The accessory nerve is the nerve primarily responsible for the motor function of neck muscles. Specifically, it innervates the sternocleidomastoid and trapezius muscles, which are crucial for movements such as head rotation, shoulder elevation, and neck extension. This nerve allows for the coordination and control of these important muscle groups, facilitating a range of movements in the neck and shoulders.

In contrast, the other nerves mentioned have different primary functions. The hypoglossal nerve mainly controls the movements of the tongue. The vagus nerve is a mixed nerve that plays significant roles in involuntary bodily functions, including heart rate and digestion. The trigeminal nerve is primarily responsible for sensation in the face and motor functions such as biting and chewing. Thus, the accessory nerve stands out as the key player in motor functions pertaining to neck muscles.

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Vagus Nerve

Trigeminal Nerve

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