Anatomy anterior thigh compartment muscles

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pectineus origin

superior ramus of pubis

pectineus insertion

pectineal line of femur, just inferior to lesser trochanter

pectineus innervation

femoral nerve (L2)

pectineus action

adducts and flexes thigh and medial rotation

psoas major origin

sides of T12-L5 vertebrae and discs between then; TPs of all lumbar vertebrae

psoas major insertion

lesser trochanter of femur

psoas major innervation

anterior rami of lumbar nerves (L1/2)

psoas major action

flexes thigh at hip joint and stabilizes the hip

psoas minor origin

sides of T12-L1 vertebrae and discs between them

psoas minor insertion

pectineal line, iliopectineal eminence via iliopectineal arch

psoas minor innervation

anterior rami of lumbar nerves

psoas minor action

flexes thigh at hip joint and stabilizes the hip

iliacus origin

iliac crest; iliac fossa; ala of sacrum and anterior sacroiliac ligaments

iliacus insertion

tendon of psoas major; lesser trochanter, and femur distal to it

iliacus innervation

femoral nerve(L2)

iliacus action

flexes thigh at hip joint and stabilizes the hip

iliopsoas

combination of the psoas major and the iliacus

sartorius origin

ASIS and superior part of notch inferior to it

sartorius insertion

superior part of medial surface of tibia

sartorius innervation

femoral nerve

sartorius action

flexes, abducts and laterally rotates thigh at hip joint; flexes leg at knee joint

rectus femoris origin

AIIS and ilium superior to acetabulum

rectus femoris insertion

via common quadriceps tendon

rectus femoris innervation

femoral nerve (L3,4)

rectus femoris action

extend leg at knee joint and steadies hip joint and helps iliopsoas flex thigh

vastus lateralis origin

greater trochanter and lateral lip of linea aspera of femur

vastus lateralis insertion

via common quadriceps tendon

vastus lateralis innervation

femoral nerve (L3,4)

vastus lateralis action

extend leg at knee joint

vastus medialis origin

intertrochanteris line and medial lip of linea aspera of femur

vastus medialis insertion

via common quadriceps tendon

vastus medialis innervation

femoral nerve (L3,4)

vastus medialis action

extend leg at knee joint

vastus intermedius origin

anterior and lateral surfaces of shaft of femur

vastus intermedius insertion

via common quadriceps tendon

vastus intermedius action

femoral nerve (L3,4)

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