Читать книгу Ashtanga Yoga - Gregor Maehle - Страница 244

FIGURE 14 EXTERNAL ROTATORS

External (lateral) rotation is performed by a group of six muscles that are situated under the gluteus maximus. The uppermost of these lateral rotaters, the piriformis, originates at the sacrum. The large sciatic nerve usually emerges from beneath the piriformis muscle. Sciatic pain is often caused by a chronically tight piriformis pressing onto the sciatic nerve.

The other five lateral rotators, the gemellus inferior and superior, the obturator internus and externus, and the quadratus femoris, originate at the posterior aspect of the ischium (lower posterior portion of the pelvis). All six lateral hip rotators insert into the greater trochanter of the femur.

Since the pelvis is suspended like a hammock by the lateral rotators, any irregularity between the two sides will result in the pelvis not being level. Lateral rotation is also performed as a secondary function by the gluteus maximus, the gluteus medius, the sartorius, the biceps femoris, the adductor magnus, the adductor brevis, and the psoas muscle.