Fig. 18 Cadaver neck dissection (left), with the cervical carotid artery retracted away from the superior cervical ganglion. Note the groove (arrow) created by the carotid artery. Enlarged anterior-posterior view of the superior cervical ganglion (right) with obvious carotid indentation mark. (Courtesy of Dr. Yochanan Goldhammer; Goldhammer Y, Nathan H, Luchansky E: Compression of the superior cervical sympathetic ganglion by the internal carotid artery demonstrated by anatomic studies: A possible etiology of the Horner's syndrome in the elderly. Presented at the Fourth International Neuro-Ophthalmology Society Meeting, Hamilton, Bermuda, June, 1982)