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Segmental Innervation of the Lower Limb


MUSCLE L1 L2 L3 L4 L5 S1 S2 S3 S4 NERVE
Quadratus
Lumborum
X X X - - - - - - Lumbar Plexus
Psoas minor X X - - - - - - - Lumber Plexus
Psoas major X X X - - - - - - Lumbar Plexus
Ilacus - X X - - - - - - Lumber Plexus
Pectineus - X X X - - - - - Femoral
Sartorius - X X X - - - - - Femoral
Quadriceps femoris - X X X - - - - - Femoral
Gracilis - X X - - - - - - Obturator
Adductor Longus - X X X - - - - - Obturator
Adductor Brevis - X X X - - - - - Obturator
Adductor Magnus - X X X - - - - - Obturator
Add. Magnus (Posterior) - - - X X X - - - Sciatic - (Tibial)
Obturator Externus - - X X - - - - - Obturator
Gluteus Medius - - - X X X - - - Superior Gluteal
Gluteus Minimus - - - X X X - - - Superior Gluteal
Tensor Fascia Lata - - - X X X - - - Superior Gluteal
Gluteus Maximus - - - - X X X - - Inferior Gluteal
Piriformis - - - - X X X - - Sacral Plexus
Superior Gemellus - - - - X X X - - Obturator Internus N.
Obturator Internus - - - - X X X - - Obturator Internus N.
Inferior Gemellus - - - X X X - - - Quadratus femoris
Quadratus femoris - - - X X X - - - Nerve
Semimembranosus - - - - X X X - - Sciatic (T)
Semitendinosus - - - - X X X - - Sciatic (T)
Biceps femoris (L) - - - - X X X - - Sciatic (T)-
Biceps femoris (S) - - - - X X X - - Sciatic (CP)
Tibialis anterior - - - X X - - - - Deep Peroneal
Extensor hallicus longus - - - - X X - - - Deep Peroneal
Extensor digitorum longus - - - - X X - - - Deep Peroneal
Peroneus tertius - - - - X X - - - Deep Peroneal
Extensor digitorum brevis - - - - X X - - - Deep Peroneal
Peroneus longus - - - - X X X - - Superficial Peroneal
Peroneus brevis - - - - X X X - - Superficial Peroneal
Plantaris - - - - X X - - - Tibial
Popliteus - - - - X X - - - Tibial
Gastrocnemius - - - - - X X - - Tibial
Soleus - - - - - X X - - Tibial-
Tibialis Posterior - - - X X - - - - Tibial
Flexor Digitorum Longus - - - - - X X - - Tibial
Flexor Hallicus Longus - - - - - X X - - Tibial
Abductor Hallicus - - - - X X - - - Medial Plantar
Flexor Digitorum Brevis - - - - X X - - - Medial Plantar
Flexor Hallicus Brevis - - - - X X - - - Medial Plantar
Lumbricals 1 - - - - X X - - - Medial Plantar
Quadratus Plantae - - - - - - X X - Lateral Plantar
Abductor Digiti Minimi - - - - - - X X - Lateral Plantar
Flexor Digiti Minimi - - - - - - X X - Lateral Plantar
Lumbricals 2, 3, 4 - - - - - - X X - Lateral Plantar
Oppon. Digiti Minimi - - - - - - X X - Lateral Plantar
Adductor Hallicus - - - - - - X X - Lateral Plantar
Plantar Interossei - - - - - - X X - Lateral Plantar
Dorsal Interossei - - - - - - X X - Lateral Plantar

X = Spinal nerve segments contributing to the innervation of a muscle.
X (bolded) = Main spinal nerve root innervating a muscle. The muscle used to test the integrity of the
particular spinal nerve.

[an error occurred while processing this directive] Last Modified: March 8, 2011