2. Gluteal and Posterior Thigh and Popliteal Fossa Muscles Flashcards
Gluteus Maximus M.
Action: Extend thigh and assist in lateral rotation
Innervation: Inferior gluteal N.
Blood Supply: Inferior gluteal A. and superficial branch of superior gluteal A.
Gluteus Medius M.
Action: Abduct and medial rotate thigh
Innervation: Superior gluteal N.
Blood Supply: superior gluteal A.
Gluteus Minimus M.
Action: Abduct and medially rotate
Innervation: Superior gluteal N.
Blood Supply: Superior gluteal A.
Tensor Fascia Lata M.
Action: Abduct, medially rotate and flex thigh, maintains extended leg
Innervation: Superior gluteal N.
Blood Supply: Superior gluteal A./Lateral circumflex femoral A.
Piriformis M.
Action: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head
Innervation: Nerve to the piriformis M.
Blood Supply: Both gluteal As. and lateral sacral A.
Superior Gemellus M.
Action: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head
Innervation: Nerve to the obturator internus M.
Blood Supply: Inferior gluteal A.
Inferior Gemellus M.
Action: Laterall rotate extended thigh, abduct flexed thigh, stabilize femoral head
Innervation: Nerve to the quadratus femoris M.
Blood Supply: Inferior gluteal A.
Quadratus Femoris M.
Action: Laterally rotate thigh, stabilize femoral head in acetabulum
Innervation: Nerve to quadratus femoris M.
Blood Supply: Inferior gluteal A.
Obturator Externus M.
Action: Laterally rotate thigh, stabilize femoral head in acetabulum
Innervation: Obturator N.
Blood Supply: Obturator A.
Obturator Internus M.
Action: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head
Innervation: Nerve to the obturator internus M.
Blood Supply: Superior gluteal A.
Biceps Femoris M.
Action: Both heads: flex and laterally rotate leg when flexed
long head: extend thigh
Innervation: Long head: tibial division of sciatic N.
Short head: common fibular division of sciatic N.
Blood Supply: perforating arteries of profunda femoris A. and superior muscular branch of popliteal A.
Semitendinosus M.
Action: Extend thigh, flex and medially rotate leg when flexed
Innervation: Tibial division of sciatic N.
Blood Supply: perforating arteries of profunda femoris A.
Semimembranosus M.
Action: Extend thigh, flex and medially rotate when flexed
Innervation: Tibial division of sciatic N.
Blood Supply: perforating arteries of profunda femoris A.
