The facial nerve is the seventh of the twelve cranial ... and raising of the corner of your mouth to smile. Marginal mandibular branch. Information on this branch goes to muscles that control ...

Finally, to test the motor division of the mandibular branch, palpate the masseter ... to that side when the mouth is opened. The facial nerve provides motor innervation to the muscles involved ...

The mandibular nerve. This branch of the trigeminal nerve has both sensory and motor parts. It carries sensations from the lower part of your face, including the jaw, lower lip, and gums.