cervical ganglion superior cervical ganglion BTO:0001325 BrendaTissueOBO The uppermost ganglion on the sympathetic trunk, lying behind the internal carotid artery and in front of the second and third cervical vertebrae; it gives rise to postganglionic fibers to the heart via cervical cardiac nerves, to the pharyngeal plexus and thence to the larynx and pharynx, and to the head via the external and internal carotid plexuses. ganglion cervicale superius