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Gluteus Maximus Origin Insertion • • • • Ilium posterior Gluteal line Sacrum and coccyx Sacrotuberous ligament • Gluteal tuberosity Nerve • Inferior gluteal nerve Action • Extends hip Gluteus Medius Origin Insertion • Ilium between anterior and posterior gluteal lines • Greater trochanter Nerve • Superior gluteal nerve Action • Abducts and medially rotates Gluteus Minor Origin Insertion • Ilium between anterior and inferior gluteal lines • Greater trochanter Nerve • Superior gluteal nerve Action • Abducts and medially rotates hip Tensor fasciae latae Origin Insertion • Anterior superior iliac spine • Iliotibial tract • Lateral condyle Nerve • Superior gluteal nerve Action • Abducts and medially rotates Piriformis Origin Insertion • Sacrum • Sacrotuberous ligament • Greater trochanter Nerve • Anterior rami of S1 and S2 Action • Laterally rotate extended hip • Abduct flexed hip Obturator internus Origin Insertion • Pelvic • Greater trochanter Nerve • Nerve to obturator internus L5,S1 • Nerve to quadratus femoris L5,S1 Action • Laterally rotate extended hip • Abduct flexed hip Superior gemellus Origin Insertion • Ischial spine • Greater trochanter Nerve • Nerve to obturator internus L5,S1 • Nerve to quadratus femoris L5,S1 Action • Laterally rotate extended hip • Abduct flexed hip Inferior gemellus Origin • Ischial tuberosity Insertion • Greater trochanter Nerve • Nerve to obturator internus L5,S1 • Nerve to quadratus femoris L5,S1 Action • Laterally rotate extended hip • Abduct flexed hip Quadratus femoris Origin Insertion • Ischial tuberosity • Quadrate tubercle on femur Nerve • Nerve to obturator internus L5,S1 • Nerve to quadratus femoris L5,S1 Action • Laterally rotates hip Semitendinosus Origin Insertion • Ischial tuberosity • Superior part of tibia Nerve • Tibial division of sciatic nerve Action • Flex the knee Semimembranosus Origin Insertion • Ischial tuberosity • Medial part of tibia Nerve • Tibial division of sciatic nerve Action • Flex the knee Bicep femoris Origin Insertion • Long head: Ischial tuberosity • Short head: linea aspera & supracondylar line of femur • Head of fibula Nerve • Long head: Tibial division of sciatic nerve • Short head: common fibular division of sciatic nerve Action • Flexes the knee • Assists with hip extension Gastrocnemius Origin Insertion • Lateral head: lateral condyle of femur • Medial head: medial condyle • Calcaneus w/calcaneal tendon Nerve • Tibial nerve Action • Plantarflexes when knee is extended Soleus Origin Insertion • Head of fibula • Medial border of tibia • Calcaneus w/calcaneal tendon Nerve • Tibial nerve Action • Plantarflexes
