primary segmental supply of secondary segmental supply of segmental composition of segmental supply of Piriformis Obturator internus Gluteus maximus Gluteus medius Gluteus minimus Gemellus superior Gemellus inferior Quadratus femoris Biceps femoris Semitendinosus Tensor fasciae latae Semimembranosus Extensor hallucis longus Extensor digitorum longus Fibularis tertius Fibularis longus Fibularis brevis Gastrocnemius Soleus Plantaris Popliteus Flexor hallucis longus Multifidus Head of right semimembranosus Head of left semimembranosus Abductor hallucis Flexor hallucis brevis Flexor digitorum brevis First lumbrical of foot Nerve to flexor hallucis brevis Long head of biceps femoris Long head of right biceps femoris Long head of left biceps femoris Short head of biceps femoris Short head of right biceps femoris Short head of left biceps femoris Flexor digitorum longus Tibialis posterior Extensor digitorum brevis Extensor hallucis brevis Sacral segmental innervation S1 63522 S1 S1 dermatome Superficial part of soleus Deep part of soleus