NEET PG DENTAL EXAM

Detailed explanation-1: -[1] Of the five major branches of the facial nerve, the marginal mandibular branch of the facial nerve supplies muscles of the lower lip. The most frequent cause of paralysis of this nerve is iatrogenic injury during operations in the mandibular or parotid regions.

Detailed explanation-2: -The marginal mandibular branch is one of the terminal branches of the mandibular division of the facial nerve. It leaves the anterior–inferior border of the parotid gland, makes a curve down to the submandibular gland, and runs along the angle and inferior border of the mandible.

Detailed explanation-3: -The marginal mandibular branch of the facial nerve is responsible for the motor function of the depressor anguli oris, the depressor labii inferioris, the inferior fibers of the orbicularis oris and the mentalis muscles (2-4).

Detailed explanation-4: -Marginal mandibular nerve, a branch of the facial nerve supplies the depressor anguli oris, the depressor labii inferioris, the mentalis and the orbicularis oris.