Muscles Innervated
The marginal mandibular branch innervates the following muscles:
- Depressor labii inferioris- lowers bottom lip down and laterally. Origin: Anterior part of oblique line of mandible. Insertion: Lower lip at midline, blends with musle from opposite side.
- Depressor anguli oris (triangularis) - lowers corner of the mouth down and laterally. Origin: Oblique line of mandible below canine, premolar, and first molar teeth. Insertion: Skin at the corner of mouth and blending with orbicularis oris.
- Mentalis - raises and protrudes lower lip as it wrinkles skin on chin. Origin: Mandible inferior to incisor teeth. Insertion: Skin of chin
Read more about this topic: Marginal Mandibular Branch Of Facial Nerve
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