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Lower Leg Compartments (Anterior Compartment (Muscles Origin, Insertions,…

- - - - A: extends great toe and dorsiflexes ankle
      - I: dorsal aspect of base of distal phalanx of great toe
      - O: middle part of anterior surface of fibula and interosseous membrane
      - N: Deep Fibular Nerve
    - - O: Lateral condyle and superior half tibia and interosseous membrane
      - N: Deep Fibular Nerve
      - I: medial and inferior surfaces of medial cuneiform and base of 1st metatarsal
      - O: Lateral condyle and superior half tibia and interosseous membrane
    - - N: Deep Fibular Nerve.
      - A: dorsiflexes ankle and aids in eversion of foot
      - I: dorsum aspect of base of 5th metatarsal
      - O: head and superior two thirds of lateral surface of fibula
    - - I: middle and distal phalanges of lateral four digits
      - A: Extends lateral four digits and dorsiflexes ankle
      - O: lateral condyle of tibia and superior three quarters of medial surface of fibula and itnerosseous membrane
      - N: Deep Fibular Nerve
- - - - Flexor Digitorum Longus
        
        I: base of distal phalanges of lateral four digits
        
        O: medial part of posterior surface of tibia inferior to soleal line; by a broad tendon to fibula
        
        A: flexes lateral four digits; plantarflexes ankle; supports longitudinal arches of foot
        
        N: Tibial Nerve
      - Flexor Hallucis Longus
        
        O: inferior two thirds of posterior surface of fibula; inferior part of interosseous membrane
        
        I: base of distal phalanx of great toe
        
        A: flexes great toe at all joints; weakly plantarflexes ankle; supports longitudinal arch of foot
        
        N: Tibial Nerve
      - Tibialis Posterior
        
        I: tuberosity of navicular, cuneiform, cuboid, and sustentaculum tail of 2nd, 3rd, and 4th metatarsals
        
        A: plantarflexes ankle; inverts foot
        
        O: interosseus membrane; posterior surface of tibia interior to soleal line; posterior surface of fibula
        
        N: Tibial Nerve
      - Popliteus
        
        A: weakly flexes knee and unlocks it by rotating femur 5degrees on fixed tibia of unplanted limb
        
        N: Tibial Nerve
        
        I: Posterior surface of tibia and superior to soleal line
        
        O: Lateral surface of lateral condyle of femur and lateral meniscus
    - - Plantaris
        
        O: inferior end of lateral supracondylar line of femur; oblique popliteal ligament
        
        I: Posterior surface of calcaneus via calcaneal tendon
        
        A: weakly assists gastrocnemius in plantarflexing ankle
        
        N: Tibial Nerve
      - Gastrocnemius
        
        I: Posterior surface of calcaneus via calcaneal tendon
        
        A: plantarflexes ankle when knee is extended; raises heel during walking; flexes leg and knee joint
        
        O: Lateral Head: lateral aspect of lateral condyle of femur
        Medial Head: popliteal surface of femur; superior to medial condyle
        
        N: Tibial Nerve
      - Soleus
        
        I: Posterior surface of calcaneus via calcaneal tendon
        
        A: plantarflexes ankle independent of position of knee; steadies leg on foot
        
        N: Tibial Nerve
        
        O: posterior head and superior quarter of posterior fibula; soleal line and middle third of medial border of tibia, tendinous arch extending between the bony attachments
- - - - I: dorsal surface of tuberosity on later side of base on 5th metatarsal
      - A: everts foot and weakly plantarflexes ankle
      - O: inferior two thirds of lateral surface of fibula
      - N: Superficial Fibular Nerve
    - - A: everts foot and weakly plantarflexes ankle
      - O: head and superior two thirds of lateral surface of tibia
      - N: Superficial Fibular Nerve
      - I: base of 1st metatarsal and medial cuneiform