Posterior Thigh Muscles Flashcards
Piriformis
O: Anterolateral surface of sacrum
I: Superior medial aspect of greater trochanter of femur
A: Abduction of thigh at hip, External rotation of thigh at hip
Superior Gemellus
O: Posterior surface of Ischial Spine
I: Medial surface of greater trochanter
A: Abduction of thigh at hip, External rotation of thigh at hip
Inferior Gemellus
O: Ischial tuberosity
I: Medial surface of greater trochanter
A: Abduction of thigh at hip, External rotation of thigh at hip
Quadratus Femoris
O: Lateral border of ischial tuberosity
I: Intertrochanteric crest of femur
A: External rotation of thigh at hip
Adductor Brevis
O: Inferior pubic ramus
I: Medial lip of linea aspera of femur
A: Adduction of thigh at hip, Flexion of thigh at hip
Adductor Longus
O: Superior pubic ramus, Anterior surface of pubic symphysis
I: Medial lip of Linea aspera of femur
A: Adduction of thigh at hip, Flexion of thigh at hip, Internal rotation of thigh at hip
Adductor Magnus (Anterior Head)
O: Inferior pubic ramus, Ischial ramus, Ischial tuberosity
I: Medial lip of linea aspera of femur
A: Adduction of thigh at hip, Flexion of thigh at hip, Internal rotation of thigh at hip
Pectineus
O: Superior pubic ramus
I: Pectineal line inferior to lesser trochanter of femur, Proximal linea aspera
A: Adduction of thigh at hip, Flexion of thigh at hip
Gracilis
O: Inferior pubic ramus
I: Medial surface of tibia inferior to medial condyle
A: Adduction of thigh at hip, Internal rotation of thigh at hip, Flexion of thigh at hip
Biceps Femoris Long Head
O: Ischial tuberosity
I: Head of fibula, lateral condyle of tibia
A: Flexion of leg at knee, Extension of thigh at hip, External rotation of thigh at hip
Biceps Femoris Short Head
O: Lateral lip of Linea aspera
I: Head of fibula, lateral condyle of tibia
A: Flexion of leg at knee, Extension of thigh at hip, External rotation of thigh at hip
Semitendinosus
O: Ischial tuberosity
I: Anteromedial aspect of tibia, Pes anserinus
A: Flexion of leg at knee, Extension of thigh at hip, Internal rotation of thigh at hip
Semimembranosus
O: Ischial tuberosity
I: Posterior surface of medial condyle of tibia
A: Flexion of leg at knee, Extension of thigh at hip, Internal rotation of leg at knee
Obturator Internus
O: Lateral and medial margins of obturator foramen
I: Medial surface of greater trochanter
A: Abduction of thigh at hip, External rotation of thigh at hip
Obturator Externus
O: Lateral and medial margins of obturator foramen
I: Trochanteric fossa of femur
A: Abduction of thigh at hip, External rotation of thigh at hip
