The angle of the ischiatic arch (angle 1) was the only measurement that definitively identified the sex of an unknown moose.
Angle 1, the ischiatic arch (the most robust sexing technique of the study) was measured with a device that appears cumbersome and difficult to use without proper instruction.
Among its branches, there are the superior gluteal artery, the inferior gluteal artery and the internal pudendal artery that go out from the pelvis through the greater ischiatic foramen to the gluteal region (Moore & Dalley, 2004).
In the extrapelvic course of the inferior gluteal artery was observed that one of its branches, called ischiatic artery, is a long and thin vessel that is related to the ischiatic nerve; and that the internal pudendal artery in this region sends only muscular branches to irrigate the muscles of this region (Williams et al., 1979).
(1994) related that the presence of aneurysms and pseudoaneurysms in these vessels could lead to a compression of the ischiatic nerve causing lumbar and sciatic pains in the patients.
During a dissection of the gluteal region in a 60-year-old male sex corpse, used in practical lessons of various courses of medical area, was observed a variation in the origin and the course of the right ischiatic artery.
In the anatomic piece was observed that this artery started from the internal pudendal artery and its caliber was larger than the ones observed in the pieces of routine studies, and its syntopy with the ischiatic nerve was also different from the ones found and described in the literature.
According to Testut & Latarjet (1975) the ischiatic artery is a branch of anterior trunk of internal iliac artery, located anterior to the internal pudendal artery and goes out from the pelvis, inferior to the pyramidal muscle, what is different from the study of Williams et al.
On 18 cases it was observed only one innervation branch, coming from the tibial portion of the ischiatic
nerve directed to the semimembranosus muscle and in the remaining 10 cases it was observed that two branches were received by the semimembranosus muscle.