LE actions & nerves

Iliopsoas

hip flexion

psoas anterior rami L1-L3, iliacus femoral L2-L3

Gluteus maximus

Extension & external rotation

Inferior gluteal L5-S2

Gluteus medius

Abduction; pelvic stabilization

Superior gluteal L4-S1

Gluteus minimus

Abduction & internal rotation

Superior gluteal L4-S1

TFL

Flextion, abduction, internal rotation

Superior gluteal L4-S1

Adductor longus

Adduction, assists flexion

Obturator L2-L4

Adductor magnus

Adduction; hamstring part extension

Obturator L2-L4

Tibial division sciatic L4

Sartorius

Hip flexion/abduction, knee flexion

Femoral L2-L3

Rectus femoris

Knee extension & hip flexion

Femoral L2-L4

Vastus medialis

Knee extension, patellar stabilization

Femoral L2-L4

Vastus lateralis

Knee extension

Femoral L2-L4

Vastus intermedius

Knee extension

Femoral L2-L4

Biceps femoris long head

Knee flexion & external rotation, hip extension

Tibial division sciatic L5-S2

Biceps femoris short head

Knee extension & external rotation

Common fibular division sciatic L5-S2

Semitendinosis & semimembranosus

Knee flexion & internal rotation, hip extension

Tibial division sciatic L5-S2

Popliteus

Unlocks knee; assists tibial internal rotation in open chain

Tibial L4-S1

Tibialis anterior

Dorsiflexion & inversion

Deep fibular L4-L5

Extensor hallicus longus

Big-toe extension & dorsiflexion

Deep fibular L5

Extensor digitorum longus

Toe extension & dorsiflexion

Deep fibular L5-S1

Fibularis longus

Eversion & weak plantar flexion; arch support

Superficial fibular L5-S2

Fibularis brevis

Eversion & weak plantar flexion

Superficial fibular L5-S2

Gastrocnemius

Plantarflexion, knee flexion

Tibial S1-S2

Soleus

Plantarflexion; postural control

Tibial S1-S2

Tibialis posterior

Plantarflexion & inversion, medial arch support

Tibial L4-L5

Flexor hallucis longus

Big-toe flexion & plantarflexion assist

Tibial S2-S3

Flexor digitorum longus

Toe flexion & plantarflexion assist

Tibial S2-S3