Inside the occlusal muscle

Inside the occlusal muscle , m. Obturatorius internus, is a flattened muscle in which the muscle bundles are slightly fan-shaped. The wide part of the muscle originates from the inner surface of the hip bone in the circumference of the locking membrane and from its inner surface. A small gap between the fascicles of the muscle and the blocking groove of the pubic bone turns into a canalis, canalis obturatorius, through which the vessels and nerve pass. Then the muscle bundles, converging, go to the outside and, bending almost at right angles through a small sciatic notch, leave the pelvic cavity through a small sciatic hole , attaching a short powerful tendon in the region of the fossa. At the inflection point, through the edge of the small sciatic notch, there is a sciatic bag of the inner occlusal muscle, bursa ischiadica m. Obturatorii interni, and at the place of attachment of the muscle there is another small subordinate bag of the inner occlusal muscle, bursa subtendinea m. Obturatorii interni.

Topographically, the internal blocking muscle is divided into two parts: a large, up to the exit from the pelvic cavity , an intra-tantalum, and a smaller tendon, lying under the large gluteal muscle , vnetazovuyu.

Function: supines thigh .

Innervation: rr. Musculares plexus sacralis [(LIV-SII (SIII)].

Blood supply: aa. Glutea inferior, obturatoria, pudenda interna.