Posterior compartment of leg
The posterior compartment of the leg is one of the fascial compartments of the leg and is divided further into deep and superficial compartments.
|Posterior compartment of leg|
|Artery||posterior tibial artery|
|Latin||compartimentum cruris posterius|
Deep posterior compartment
|Flexor hallucis longus||Inferior two-thirds of posterior surface of fibula; inferior part of interosseous membrane||Base of distal phalanx of big toe (hallux)||Tibial nerve |
|Flexes big toe at all joints; weakly plantarflexes ankle; supports medial longitudinal arch of foot|
|Flexor digitorum longus||Medial part of posterior surface of tibia; by a broad tendon to fibula||Bases of distal phalanges of lateral four digits||Flexes lateral four digits; plantarflexes ankle; supports longitudinal arches of foot|
|Tibialis posterior||Interosseous membrane; posterior surface of tibia inferior to soleal line; posterior surface of fibula||Tuberosity of navicular, cuneiform, cuboid, and sustentaculum tali of calcaneus; bases of 2nd, 3rd, and 4th metatarsals|
|Plantarflexes ankle; inverts foot|
|Popliteus||Lateral surface of lateral condyle of femur and lateral meniscus||Posterior surface of tibia, superior to soleal line|
(L4, L5, S1)
|Weakly flexes knee and unlocks it by rotating femur 5 deg on fixed tibia; medially rotates tibia of unplanted limb|
Superficial posterior compartment
|Gastrocnemius||Lateral head: lateral aspect of lateral condyle of femur |
Medial head: popliteal surface of femur; superior to medial condyle
|Posterior surface of calcaneus via calcaneal tendon||Tibial nerve |
|Plantarflexes ankle when knee is extended; raises heel during walking; flexes leg at knee joint|
|Soleus||Posterior aspect of head and superior quarter of posterior surface of fibula; soleal line and middle third of medial border of tibia; and tendinous arch extending between the bony attachments||Plantarflexes ankle independent of position of knee; steadies leg on foot|
|Plantaris||Inferior end of lateral supracondylar line of femur; oblique popliteal ligament||Weakly assists gastrocnemius in plantarflexing ankle|
The posterior compartment of the leg is supplied by the tibial nerve.
- It contains the plantar flexors:
- Moore, Dally, and Agur (2014). Moore Clinically-Oriented Anatomy, Table 5.13.II, p 598.
- Moore, Dally and Agur (2014). Moore Clinically-Oriented Anatomy, Table 5.13.I, p 597.
- postleg at The Anatomy Lesson by Wesley Norman (Georgetown University)
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