Hip, Pelvis, & Groin Muscle Origin and Insertion

Gluteus Medius Origin

ilium

Gluteus Medius Insertion

greater trochanter of the femur

Gluteus Medius Action(s)

abduct hip, internally rotate hip

Gluteus Maximus Origin

sacrum; ilium; thoracolumbar fascia; sacrotuberous ligament

Gluteus Maximus Insertion

iliotibial tract; gluteal tuberosity

Gluteus Maximus Action(s)

extend hip, externally rotate hip

Piriformis Origin

pelvic surface of the sacrum

Piriformis Insertion

greater trochanter of the femur

Piriformis Action(s)

externally rotate hip

Biceps Femoris Long Head Origin

ischial tuberosity

Biceps Femoris Short Head Origin

linea aspera of femur

Biceps Femoris Insertion

head of fibula

Biceps Femoris Action(s)

extend hip, externally rotate hip, flex knee, externally rotate knee

Semitendinosus Origin

ischial tuberosity

Semitendinosus Insertion

proximal tibia below medial condyle

Semitendinosus Action(s)

extend hip, internally rotate hip, flex knee, internally rotate knee

Semimembranosus Origin

ischial tuberosity

Semimembranosus Insertion

medial condyle of tibia

Semimembranosus Action(s)

extend hip, internally rotate hip, flex knee, internally rotate knee