Transversus Colli Nerve, Gross Anatomy

Description

Originating from the cervical plexus (typically C2 to C3), the transverse cervical nerve (nervus transversus colli) courses anterolaterally across the lateral neck after emerging at the posterior border of the sternocleidomastoid near Erb’s point. Its superficial branches spread anteriorly over the carotid triangle toward the anterior cervical region, distributing cutaneous fibers to skin overlying the infrahyoid area and upper anterolateral neck. Nearby skeletal landmarks in the model include the mandible and skull base superiorly, the cervical vertebrae posteriorly, and the clavicle and scapula inferiorly, which frame the nerve’s pathway toward the shoulder girdle. This is a teaching-friendly nerve to localize because it travels in the same superficial plane as the other sensory branches of the cervical plexus, yet its field overlaps with the supraclavicular nerves inferiorly and with the great auricular nerve superiorly. Surgeons encounter it during anterior approaches to the neck, including carotid endarterectomy and submandibular procedures, where traction or transection can leave a patch of anterolateral neck numbness that patients often describe as bothersome rather than painful. Regional anesthesia matters here. A superficial cervical plexus block targets these cutaneous branches at the midpoint of the posterior sternocleidomastoid border, and this view supports accurate surface correlation. Ideal for gross anatomy and neuroanatomy teaching in medical and dental curricula, this illustration also suits ENT and vascular surgery texts that explain sensory deficits after lateral neck incisions or during dissection around the sternocleidomastoid and carotid sheath. Clinicians can also use it in consent discussions to clarify expected sensory changes after neck surgery. Anatomical accuracy verified by SciePro's Medical Advisory Board.