Lower Body Muscles (in depth)

Sartorius action

crosses legs

Gracilis action

adducts hip/thigh

Adductor magnus action

adducts hip/thigh

Adductor longus action

adducts hip/thigh

Iliopsoas action

flex hip/thigh

Vastus lateralis origin

linea aspera of femur

Vastus lateralis insertion

tibial tuberosity

Vastus lateralis action

extend knee

Vastus medialis origin

linea aspera of femur

Vastus medialis insertion

tibial tuberosity

Vastus medialis action

extend knee

Rectus femoris origin

ilium

Rectus femoris insertion

tibial tuberosity

Rectus femoris action

extend knee; flex hip/thigh

Gluteus maximus action

extend hip/thigh

Gluteus medius action

abducts thigh/hip

Tensor fascia latae action

abducts hip/thigh

Semitendinosus origin

ischial tuberosity

Semitendinosus insertion

tibia head

Semitendinosus action

•flex knee

•extend hip/thigh

Semimembranosus origin

ischial tuberosity

Semimembranosus insertion

tibia head

Semimembranosus action

•flex knee

•extend hip/thigh

Biceps femoris origin

ischial tuberosity

Biceps femoris insertion

fibula head

Biceps femoris action

•flex knee

•extend hip/thigh

Gastrocnemius insertion

calcaneus

Tibialis anterior origin

tibia