During dissection of the cervical region in the anatomy laboratory a unique nervous trunk was found bilaterally just inferior to the base of the cranium. The length of this trunk is about 25 mm. The nervous trunk is placed lateral to the internal carotid artery and medial to the internal jugular vein, later the single trunk runs posterior to the internal carotid artery. At the level of the occipital artery both trunks divide into two branches. One branch loops around this artery and goes below the tendon of the digastric muscle. This branch correspond to the hypoglossal nerve. Another branch arising from this unique nervous trunk runs posterior to the internal carotid artery and then posterior to the common carotid artery and then descends toward the thorax. This branch corresponds to the vagus nerve.On the right side, the hypoglossal nerve gives rise a single branch that then divides into two branches one for the geniohyoid and another for the thyrohyoid muscles. The descending hypoglossal branch was absent. Thirteen millimeters from its origin the vagus nerve gives rise a long branch that anastomoses with a long branch arising from the accessory nerve forming a nerve loop, vagal‐accessory ansa cervicalis. From this loop the arise the branches to the stenohyoid, omohyoid and sternothyroid muscles.On the left side the unique trunk receive comunicating branches from C2, then C2 gives a long descendig branch that anastomoses with a long branch from the vagus nerve. This cervico‐vagal ansa cervicalis gives a branch to the omohyoid muscle. The vagus nerve gives a branch to the sternohyoid and sternothyroid muscles. The thyrohyoid muscle receives innervation directly from the hypoglossal nerve. Awareness of this unique anatomical variation in the cervical region is important to the surgeon during a reinnervation of the paralyzed larynx.