C1: Cervical segment

Begins in neck at carotid bifurcation where the common carotid artery divides into internal carotid artery and external carotid artery. Travels in carotid sheath with IJV and vagal nerve, encircled with postganglionic sympathetic nerves (PGSN). C1 ends where the ICA enters carotid canal of petrous bone. No branches