Adductor Longus: The adductor longus is a large, flat muscle covering the adductor magnus and adductor brevis.The five muscles of the adductor group are responsible for the adduction of the thigh, although several have additional functions. The iliacus and psoas major comprise the iliopsoas group and can be seen at the pelvis and lower spine. (a) Adductor Group Muscles and (b) Key muscles associated with movement at the hip: The deep-lying adductor group muscles originate from the pubis and attach to the length of the femur. Actions: Lateral rotation of the thigh at the hip, plays a major role in extension of the lower leg at the knee as well.It is the most inferior of the lateral rotator group muscles, located below the gemelli and obturator internus. Quadratus Femoris: The quadratus femoris is a flat, square-shaped muscle (actually composed of four distinct muscles).Gemelli: The gemelli are two (superior and inferior) narrow and triangular muscles, separated by the obturator internus tendon. ![]() Obturator Internus: The obturator internus lines the internal wall of the pelvis.Actions: Lateral rotation and abduction of the thigh at the hip.Piriformis: The piriformis is the most superior of the lateral rotator group muscles.All of the lateral rotator group muscles originate from the pelvis and attach to the femur. The muscles of the lateral rotator group are deeply located and as the name suggests, act to laterally rotate the thigh at the hip. Attachments: Originates from the pelvis and attaches to the femur.Gluteus Minimus: The gluteus minimus is the deepest and smallest of the superficial gluteal muscles and performs a similar function to the gluteus medius.Actions: Abducts and medially rotates the thigh and fixes the pelvis during walking.Attachments: Originates from the posterior of the pelvis and attaches to the femur.Gluteus Medius: The fan-shaped gluteus medius muscle lies between the gluteus maximus and minimus and performs a similar function to the gluteus minimus.Is only used when the generation of force is required (e.g. ![]() ![]()
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