Reports of a correlation between relief of migraine headaches and resection of corrugator muscles or injection of botulinum A toxin have renewed interest in finding the etiology of migraine headaches. Four trigger points have been described. One of these is the greater occipital nerve (GON). Studies are being conducted to either inject botulinum A toxin or surgically release the GON in patients with complaints of migraine headaches originating from this area. While results are encouraging, a subset of patients who undergo either release or chemical denervation of the GON note a persistence of symptoms in the area, or a shifting of their symptoms laterally. We propose that either the lesser occipital nerve (LON) or the third occipital nerve (TON) may be involved in the persistence of these symptoms. Twenty cadaver heads were dissected to trace the course of the LON and TON, specifically looking to define the location of these nerves with respect to external landmarks. The midline and a line drawn between the inferior most points of the external auditory canals were used to obtain standardized measurements of these nerves. In this way, the location of emergence of each of these nerves was defined.