Lower Extremity Muscle Atlas
Michael L. Richardson, M.D. source University of Washington, Radiology Department

Adductor Brevis
Adductor Longus
Adductor Magnus
Biceps Femoris-Long Head
Biceps Femoris-Short Head
Extensor Digitorum Longus
Flexor Digitorum Longus
Flexor Hallucis Longus
Gastrocnemius
Gluteus Maximus
Gluteus Medius
Gluteus Minimus
Gracilis
Iliopsoas
Obturator Externus
Obturator Internus
Pectineus
Peroneus Brevis
Peroneus Longus
Peroneus Tertius
Piriformis
Plantaris
Popliteus
Quadratus Femoris
Rectus Femoris
Sartorius
Semimembranosus
Semitendinosus
Soleus
Superior Gemellus
Tensor Fascia Lata
Tibialis Anterior
Tibialis Posterior
Vastus Intermedius
Vastus Lateralis
Vastus Medialis

Semitendinosus

Origin From common tendon with long head of biceps femoris from superior medial quadrant of the posterior portion of the ischial tuberosity Insertion Superior aspect of medial portion of tibial shaft Action Extends the thigh and flexes the knee, and also rotates the tibia medially, especially when the knee is flexed Innervation Tibial nerve Arterial Supply Perforating branches of profunda femoris artery, inferior gluteal artery, and the superior muscular branches of popliteal artery The medical illustrations contained in this online atlas are copyrighted © 1997 by the University of Washington.