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LE Anterior thigh iliopsoas Psoas major Origin Insertion • T12 – L5 vertebrae • IV disks • Lesser trochanter Nerve • Anterior rami of lumbar nerves (L1,L2, & L3) Action • Flexes the thigh iliopsoas Iliacus Origin Insertion • Iliac crest • Lesser trochanter Nerve • Femoral nerve (L2 & L3) Action • Flexes thigh iliopsoas Tensor fasciae latae Origin Insertion • ASIS • Iliac crest • Iliotibial tract • Lateral condyle of tibia Nerve • Superior gluteal nerve (L4 – L5) Action • Abducts, flexes, & medially rotates hip iliopsoas Sartorius Origin • ASIS Insertion • Medial surface of tibia Nerve • Femoral nerve (L2 & L3) Action • Flexes, abducts, and laterally rotates hip Quadriceps femoris Rectus femoris Origin Insertion • AIIS • Ilium • Base of patella • Patellar ligament • Tibial tuberosity Nerve • Femoral nerve (L2,L3, and L4) Action • Extends leg at knee joint • Steadies hip joint • Helps iliopsoas flex thigh Quadriceps femoris Vastus lateralis Origin Insertion • Greater trochanter • Base of patella • Patellar ligament • Tibial tuberosity Nerve • Femoral nerve (L2,L3, and L4) Action • Extends leg at knee joint Quadriceps femoris Vastus medialis Origin Insertion • Interochanteric line • Linea aspera • Base of patella • Patellar ligament • Tibial tuberosity Nerve • Femoral nerve (L2,L3, and L4) Action • Extends leg at knee joint Quadriceps femoris Vastus intermedius Origin Insertion • Anterior and lateral surfaces of femur • Base of patella • Patellar ligament • Tibial tuberosity Nerve • Femoral nerve (L2,L3, and L4) Action • Extends leg at knee joint Pectineus Origin Insertion • Superior pubic ramus • Lesser trochanter Nerve • Femoral nerve (L2 and L3) Action • Adducts, flexes, and medially rotates thigh Adductor longus Origin Insertion • Pubis • Linea aspera of femur Nerve • Obturator nerve ( L2,L3, and L4) Action • Adducts thigh Adductor brevis Origin Insertion • Pubis • Pectineal line Nerve • Obturator nerve ( L2,L3, and L4) Action • Adducts thigh Adductor magnus Origin Insertion • Inferior pubic ramus • Ischial tuberosity • Gluteal tuberosity • Linea aspera • Adductor tubercle Nerve • Adductor part: obturator nerve (L2,L3, and L4) • Hamstring part: Tibial part of sciatic nerve (L4) Action • Adducts thigh Gracilis Origin Insertion • Pubis • Medial surface of tibia Nerve • Obturator nerve (L2 and L3) Action • Adducts Obturator externus Origin Insertion • Obturator foramen • Trochanteric fossa Nerve • Obturator nerve (L3 and L4) Action • Laterally rotates