APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Hip Extensors. The primary hip extensors include the gluteus maximus, posterior head of the adductor magnus, and the hamstrings (TABLE 2).13, 17 In the anatomic position, the posterior head of the adductor magnus has the greatest moment arm for extension, followed closely by the semitendinosus.

Detailed explanation-2: -Biceps Femoris Hamstring Muscle At the hip, both the long and short heads rotate the thigh outwardly and extend it backward. At the knee, they flex and laterally rotate the joint. Of all the hamstring muscles, the biceps femoris is the biggest contributor to hip extension.

Detailed explanation-3: -The primary hip extensors are the gluteus maximus and the hamstrings (i.e., the long head of the biceps femoris, the semitendinosus, and the semimembranosus).

Detailed explanation-4: -The hamstring muscles (particularly the semitendinosus) are more involved in knee flexion than in hip extension.

Detailed explanation-5: -The psoas is the primary hip flexor, assisted by the iliacus. The pectineus, the adductors longus, brevis, and magnus, as well as the tensor fasciae latae are also involved in flexion. The gluteus maximus is the main hip extensor, but the inferior portion of the adductor magnus also plays a role.