Débutant 22+ Pretrematic Nerve Of Third Arch
Débutant 22+ Pretrematic Nerve Of Third Arch. The third occipital nerve (ton) is a branch of the posterior root of c3, which provides cutaneous sensation to a small portion of the occipital scalp. While under the trapezius, the medial branch of the posterior division of the third cervical nerve gives off a branch called the third occipital nerve (also known as the least occipital nerve), which pierces the trapezius and ends in the skin of the lower part of the back of the head.