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

Superior Gemellus

Origin Ischial spine Insertion Medial surface of greater trochanter of femur, in common with obturator internus Action Rotates the thigh laterally; also helps abduct the flexed thigh Innervation Nerve to the obturator internus and superior gemellus -- a branch of the sacral plexus (L5, S1) Arterial Supply Inferior gluteal artery The medical illustrations contained in this online atlas are copyrighted © 1997 by the University of Washington.