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