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Which branch of the facial nerve extends to the muscles on the sides of the neck?

  1. Temporal

  2. Radial

  3. Cervical

  4. Zygomatic nerve

The correct answer is: Cervical

The facial nerve is responsible for innervating the muscles of the face and neck. While the other options may refer to nerves in the face, the cervical branch extends to the muscles on the sides of the neck specifically. The temporal nerve extends to the forehead and scalp muscles, the radial nerve is part of the brachial plexus and innervates the muscles of the arm and hand, and the zygomatic nerve is a branch of the facial nerve that extends to the cheek and nose muscles. These options are incorrect because they do not specifically address the muscles on the sides of the neck as stated in the question. Therefore, the correct answer is C Cervical.