Figure 4.
It shows a deep right gluteal region and right posterior femoral region. Gluteal major muscle retracted (1), PM (2). In this case, the SN (3), passing inferior to the PM, divides into tibial nerve (4) and common peroneal nerve (5) in the middle third of the thigh. PM dividing into the posterior femoral region upper third in its terminal branches, (4) tibial nerve, and (5) common peroneal nerve.