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Anatomy Muscles 200-225


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Tensor Fasciae Latae action
Flexes and abducts thigh, (thus a synergist of the iliopsoas and gluteus medius and minimus muscles); rotates thigh medially; steadies trunk on thigh by making iliotibial tract taut
Tensor Fasciae Latae innervation
Superior gluteal nerve
Vastus Medialis origin and insertion
origin: Linea aspera, intertrochanteric line; insertion: As for rectus femoris
Vastus Intermedius action
Extends knee
Vastus Intermedius innervation
Femoral nerve
Vastus Lateralis origin and insertion
origin: Greater trochanter, intertrochanteric line, linea aspera; insertion: As for rectus femoris
Vastus Medialis action
Extends knee; inferior fibers stabilize patella
Vastus Medialis innervation
Femoral nerve
Rectus Femoris origin and insertion
origin: Anterior inferior iliac spine and superior margin of acetabulum; insertion: Patella and tibial tuberosity via patellar ligament
Vastus Lateralis action
Extends knee
Vastus Lateralis innervation
Femoral nerve
Gracilis origin and insertion
origin: Inferior ramus and body of pubis; insertion: Medial surface of tibia just inferior to its medial condyle
Rectus Femoris action
Extends knee and flexes thigh at hip
Rectus Femoris innervation
Femoral nerve
Pectineus origin and insertion
origin: Pectineal line of pubis (and superior ramus); insertion: Inferior to lesser trochanter of posterior aspect of femur
Gracilis action
Adducts thigh, flexes, and medially rotates leg, especially during walking
Gracilis innervation
Obturator nerve
Adductor Brevis origin and insertion
origin: Body and inferior ramus and pubis; insertion: Linea aspera above adductor longus
Pectineus action
Adducts, flexes and laterally rotates thigh
Pectineus innervation
Femoral and sometimes obturator nerve
Adductor Longus origin and insertion
origin: Pubis near pubic symphysis; insertion: Linea aspera
Adductor Brevis action
Adducts and laterally rotates thigh
Adductor Brevis innervation
Obturator nerve
Adductor Magnus origin and insertion
origin: Ischial and pubic rami and ischial tuberosity; insertion: Linea aspera and adductor tubercle of femur
Adductor Longus action
Adducts, flexes, and laterally rotates thigh

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