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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 .
of thigh/femur at hip [2] Gluteus maximus; Lateral rotator group. piriformis; gemellus superior; obturator internus; pectineus ; gemellus inferior; obturator externus; quadratus femoris; Sartorius; of leg at knee [3] Biceps femoris; of eyeball (motion is also called "extorsion" or excyclotorsion) [4] Inferior rectus muscle; Inferior oblique muscle
The gluteal muscles include the gluteus maximus, gluteus medius, gluteus minimus, and tensor fasciae latae.They cover the lateral surface of the ilium.The gluteus maximus, which forms most of the muscle of the buttocks, originates primarily on the ilium and sacrum and inserts on the gluteal tuberosity of the femur as well as the iliotibial tract, a tract of strong fibrous tissue that runs ...
The action of the lateral rotators can be understood by crossing the legs to rest an ankle on the knee of the other leg. This causes the femur to rotate and point the knee laterally. The lateral rotators also oppose medial rotation by the gluteus medius and gluteus minimus. When the hip is flexed to 90 degrees, piriformis abducts the femur at ...
Both muscles also help to laterally rotate the extended thigh and abduct the flexed thigh at the hip by assisting the internal obturator. [1] The gemelli muscles act to compensate the reduced power of the internal obturator as it turns around the lesser sciatic notch. [1] Blood supply is from the inferior gluteal artery.
Gluteus Maximus: The gluteus maximus is primarily responsible for hip extension, external rotation, and helps maintain an upright posture. This muscle is a powerful hip extensor (meaning it brings ...
Its action is to extend and to laterally rotate the hip, and also to extend the trunk. The gluteus maximus is larger in size and thicker in humans than in other primates . [ 2 ] Specifically, it is approximately 1.6 times larger relative to body mass compared to chimpanzees and comprises about 18.3% of total hip musculature mass versus 11.7% in ...
Squat. Stand with feet slightly wider than hip-width apart, dumbbells racked at shoulders. Keep toes facing forward or slightly turned out, eyes forward, and back flat.