Muscle | Insertion, Origin, Action |
Sartorius | I: Pes aserine; O: Anterior superior iliac spine; A: flex knee, IR knee, ER hip, flex hip, abduct hip |
Rectus Femoris | I: Tibial Tuberosity ; O:anterior inferior iliac spine; A:hip flexion, knee extension |
Vastus Medialis | I: Tibial Tuberosity; O:Intertrochanteric line & linea aspera; A:knee extension |
Vastus Lateralis | I: Tibial Tuberosity ; O:Intertrochanteric line & linea aspera: A:knee extension |
Vastus Intermedius | I: Tibial Tuberosity; O:Intertrochanteric line; A: knee extension |
Popliteus | I: posterior medial tibial condyle; O: lateral femoral condyle; A:knee flexion |
Semimembranosus | I:posterior medial tibial condyle; O:Ischial Tuberosity; A: flex knee, extend hip |
Semitendinosus | I: Pes anserine; O: Ischial Tuberosity; A:flex knee, extend hip |
Biceps Femoris | Long Head: insertion at ischial tuberosity, origin at fibular head, action is to extend hip, flex knee
Short Head: insertion at 2/3 down the femur, origin at fibular head, action is to flex knee |
Gracilis | I: Pes aserine, O: pubic ramus; A:hip adduction, flex knee, IR(internally rotate) hip |
Pectineus | I: pectineal line of the femur; O: pectineal line of the pubis; A: flex and adduct thigh |
Adductor Magnus | I: linea aspera & adductor tubercle; O: pubic ramus & ischial tuberosity; A: one part - extends thigh; other part - flexes & adducts thigh |
Adductor Longus | I: linea aspera (mid 1/3); O: pubic body; A: adducts thigh |
Adductor Brevis | I: pectineal line & linea aspera; O: body & inferior pubic ramus; A: adducts thigh |
Iliacus | I: lesser trochanter; O: iliac fossa; A: hip flexion |
Psoas | I: lesser trochanter; O: T12-L5 vertebrae; A: hip flexion |
Tensor Fascia Lata | I: Gerdy's Tubercle (via IT band); O: anterior iliac crest; A: abducts, flexes, IR thigh |
Gluteus Maximus | I: Gluteal tuberosity of femur; IT band; O: ilium, dorsal sacrum; A: Extends and ER(externally rotate) thigh |
Gluteus Medius | I: greater trochanter (posterior); O: ilium; A: abducts thigh, IR of the thigh |
Gluteus Minimus | I: anterior surface of the greater trochanter; O: ilium; A: abducts and IR thigh |