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The lateral rotator group is a group of six small muscles of the hip which all externally (laterally) rotate the femur in the hip joint. It consists of the following muscles: piriformis, gemellus superior, obturator internus, gemellus inferior, quadratus femoris and the obturator externus. [1]
The adductor group is responsible for hip adduction. Medial rotation is performed by the gluteus medius and gluteus minimus, as well as the tensor fasciae latae and assisted by the adductors brevis and longus and the superior portion of the adductor magnus. Each muscle of the lateral rotator group causes lateral rotation of the thigh.
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The piriformis muscle is part of the lateral rotators of the hip, along with the quadratus femoris, gemellus inferior, gemellus superior, obturator externus, and obturator internus. The piriformis laterally rotates the femur with hip extension and abducts the femur with hip flexion. Abduction of the flexed thigh is important in the action of walkin...
Piriformis syndrome occurs when the piriformis irritates the sciatic nerve, which comes into the gluteal region beneath the muscle, causing pain in the buttocks and referred pain along the sciatic nerve. This referred pain is known as sciatica. Seventeen percent of the population has their sciatic nerve coursing through the piriformis muscle. This ...
The piriformis muscle was first named by Adriaan van den Spiegel, a professor from the University of Paduain the 16th century.
This article incorporates text in the public domain from page 476 of the 20th edition of Gray's Anatomy (1918)
Jan 2, 2013 · The piriformis is a long muscle that originates on the anterior surface of the lateral process of the sacrum and gluteal surface of the ilium at the margin of the greater sciatic notch. It inserts on the superior border of the greater trochanter. Like the gemellus muscles, the piriformis rotates the hip laterally.
Apr 20, 2024 · The lateral rotator group is a group of six small muscles of the hip which all externally (laterally) rotate the femur in the hip joint. It consists of the following muscles: piriformis, gemellus superior, obturator internus, gemellus inferior, quadratus femoris and the obturator externus.
Jun 20, 2017 · The deep six lateral rotators are a group of muscles that move the hip. Individually they are small, but together they are quite powerful. We covered one of the deep six lateral rotators, the piriformis, already. While you may not have heard of each of these muscle names, the group is an important one to consider in yoga.
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The overall job of the deep six lateral rotators is to keep the “ball” of the ball and socket joint (the greater trochanter of the femur) in the “socket” (the acetabulum of the pelvis) when we are walking, running or doing other movements (Yoo et al., 2015). Specifically, all six of these muscles laterally rotate the femur at the hip joint.
