Muscles of Deep posterior compartment of lower leg

Muscles of Deep posterior compartment of lower leg

Muscle	Origin	insertion	nerve	action	comment
Popliteus	Lateral femoral condyle(anterior and distal to LCL)	Proximal posterior tibia	Tibial	IR tibia/knee(during” swing” phase)	Origin is intraarticular Primary restraint to ER of knee
Flexor hallucis longus(FHL)	Posterior fibula	Base of distal phalanx of great toe	Tibial	Plantar flex great toe	Test S1 motor function
Flexor digitorum longus(FDL)	Posterior tibia	Base of distal phalanx of 4 toe	Tibial	Plantar flex 4 toe	At ankle, tendon is just anterior to tibial artery
Tibialis posterior(TP)	Posterior tibia, fibula, interosseous membrane	Plantar navicular cuneiforms, MT base	Tibial	Plantar flex and invert foot(in ”heel off” phase)	Tendon rupture/degen, can cause acquired flot foot

Ref) Netter’s concise orthopaedic anatomy P319