Original 47+ Pretrematic Nerve Of Third Arch
Original 47+ Pretrematic Nerve Of Third Arch. The trigeminal nerve (the fifth cranial nerve, or simply cn v) is a nerve responsible for sensation in the face and motor functions such as biting and chewing. The third occipital nerve is the superficial medial branch of c3 dorsal ramus. The third occipital nerve supplies an area of the medial occipital scalp, overlapping with areas supplied by the greater and lesser occipital nerves.