Branches of facial nerve are:
**Core Concept**
The facial nerve, also known as the seventh cranial nerve, is a complex nerve that controls the muscles of facial expression, taste to the anterior two-thirds of the tongue, and provides motor control to the stapedius and stylohyoid muscles in the ear. The facial nerve also carries parasympathetic fibers that regulate salivation, tear production, and pupillary constriction.
**Why the Correct Answer is Right**
The facial nerve has five branches that arise from the main trunk of the nerve after it exits the stylomastoid foramen. These branches are responsible for supplying the muscles of facial expression and other structures in the face. The five branches of the facial nerve are the temporal, zygomatic, buccal, marginal mandibular, and cervical branches. Each branch innervates specific muscles of facial expression, allowing for a wide range of facial movements.
**Why Each Wrong Option is Incorrect**
**Option A:** Temporal branch is incorrect because it is a branch of the facial nerve, but it is not one of the five main branches.
**Option B:** Masseteric branch is incorrect because it is not a branch of the facial nerve; instead, it is a branch of the trigeminal nerve that innervates the masseter muscle.
**Option C:** Occipital branch is incorrect because it is a branch of the greater occipital nerve, which arises from the dorsal ramus of the second cervical nerve, not the facial nerve.
**Clinical Pearl / High-Yield Fact**
The facial nerve is also known as the "nerve of Bell" due to its association with the 19th-century Scottish surgeon Charles Bell, who first described the nerve's function in facial expression.
**Correct Answer:** C. Temporal, zygomatic, buccal, marginal mandibular, cervical