The Transversus Colli Nerve of a Male Viewed Anteriorly

Description

Arising from the cervical plexus (predominantly C2), the transversus colli nerve (transverse cervical nerve) is shown emerging at the posterior border of the sternocleidomastoid near the midpoint, then coursing anteriorly and superficially across the muscle toward the anterior triangle. As it passes inferior to the mandible and deep to the platysma, its cutaneous branches spread medially to supply skin over the anterolateral neck and toward the submental region, lying in close relationship to the external jugular vein and the superficial cervical fascia. Superiorly, facial expression muscles including frontalis, orbicularis oculi, zygomaticus major and minor, and orbicularis oris provide landmarks for distinguishing cervical cutaneous innervation from trigeminal sensory territories. Clear visualization of the transversus colli nerve matters when teaching the “nerve point of the neck” (Erb point), where this nerve, the lesser occipital, great auricular, and supraclavicular nerves become superficial along the posterior border of sternocleidomastoid. This is a common target for a superficial cervical plexus block, and it is also where the nerve is vulnerable during lateral neck incisions, lymph node biopsy, or placement of lines and incisions that cross the external jugular region. Expect sensory loss or dysesthesia over the anterior neck if it is injured. Small nerve, real consequences. Medical educators can drop this anterior view into head and neck anatomy labs, anesthesia teaching on cervical plexus blocks, and surgical references that map cutaneous sensory fields during planning for carotid endarterectomy or submandibular approaches. It also supports patient-facing diagrams that explain postoperative numbness after neck procedures without conflating facial nerve motor branches with cervical cutaneous nerves. Anatomical accuracy verified by SciePro's Medical Advisory Board.