Gluteus medius Lateral surface of Greater trochanter of femur, lateral Abduction and medial rotation of Superior gluteal surface thigh; steadies the pelvis during walking Piriformis Anterior surface of sacrum Greater trochanter of femur Abducts thigh Twigs from sacral one and two Quadratus femoris Ischial tuberosity Elevation superior to mid-portion of Laterally rotates and stabilizes hip joint Nerve to intertrochanteric crest on posterior quadratus femur lumborum Psoas Transverse processes of bodies of Lesser trochanter of with Flex thigh at hip joint, rotate thigh Femoral lumbar vertebrae iliacus laterally, and flex trunk at hip as in Major sitting up from supine position Iliacus fossa and lateral margin of sacrum Lesser trochanter of with psoas Flex thigh at hip joint, rotate thigh Femoral major laterally, and flex trunk at hip as in sitting up from supine position MUSCLES OF THE ORIGIN INSERTION ACTION NERVE POSTERIOR THIGH Biceps femoris Long head, ischial tuberosity; Head of fibula and lateral condyle Extension of thigh; flexion of leg Sciatic of tibia Short head, lateral supracondylar ridge of femur Semimembranosus Ischial tuberosity Medial condyle of tibia Extension of thigh; flexion of leg Sciatic
Gluteus medius Lateral surface of Greater trochanter of femur, lateral surface Abduction and medial rotation of thigh; steadies the pelvis during walking Superior gluteal Piriformis Anterior surface of sacrum Greater trochanter of femur Abducts thigh Twigs from sacral one and two Quadratus femoris Ischial tuberosity Elevation superior to mid-portion of intertrochanteric crest on posterior femur Laterally rotates and stabilizes hip joint Nerve to quadratus lumborum Psoas Major Transverse processes of bodies of lumbar vertebrae Lesser trochanter of with iliacus Flex thigh at hip joint, rotate thigh laterally, and flex trunk at hip as in sitting up from supine position Femoral Iliacus fossa and lateral margin of sacrum Lesser trochanter of with psoas major Flex thigh at hip joint, rotate thigh laterally, and flex trunk at hip as in sitting up from supine position Femoral MUSCLES OF THE POSTERIOR THIGH ORIGIN INSERTION ACTION NERVE Biceps femoris Long head, ischial tuberosity; Short head, lateral supracondylar ridge of femur Head of fibula and lateral condyle of tibia Extension of thigh; flexion of leg Sciatic Semimembranosus Ischial tuberosity Medial condyle of tibia Extension of thigh; flexion of leg Sciatic