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The flexor hallucis longus is situated on the fibular side of the leg. It arises from the inferior two-thirds of the posterior surface of the body of the fibula, with the exception of 2.5 cm at its lowest part; from the lower part of the interosseous membrane; from an intermuscular septum between it and the peroneus muscles, laterally, and from the fascia covering the tibialis posterior, medially.
Main Action ! 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 (S1, S2) Plantarflexes ankle when knee is extended; raises heel during walking; flexes leg at knee joint Plantaris
The posterior tibial artery, tibial nerve, and tendons of the tibialis posterior, flexor digitorum longus, and flexor hallucis longus muscles travel in a bundle through the tarsal tunnel. Inside the tunnel, the nerve splits into three segments.
The fibularis muscles are highly variable. Several variants are occasionally present, including the peroneus digiti minimi and the peroneus quartus. [2] The quartus is more closely associated with the tendons of the extensor digitorum longus and may send a small tendon to the fifth (or little) toe.
Actions: Extends (raises) the big toe and assists in dorsiflexion of the foot at the ankle. Also is a weak evertor/invertor: Antagonist: Flexor hallucis longus, flexor hallucis brevis: Identifiers; Latin: musculus extensor hallucis longus: TA98: A04.7.02.040: TA2: 2650: FMA: 22533: Anatomical terms of muscle
In anatomy, flexor is a muscle that contracts to perform flexion (from the Latin verb flectere, to bend), [1] a movement that decreases the angle between the bones converging at a joint. For example, one's elbow joint flexes when one brings their hand closer to the shoulder , thus decreasing the angle between the upper arm and the forearm .
Main Action Fibularis longus: Head and superior two thirds of lateral surface of fibula: Base of 1st metatarsal and medial cuneiform: Superficial fibular nerve (L5, S1, S2) Everts foot and weakly plantarflexes ankle Fibularis brevis: Inferior two thirds of lateral surface of fibula: Dorsal surface of tuberosity on lateral side of base of 5th ...
Main Action Tibialis anterior: Lateral condyle and superior half of lateral surface of tibia and interosseous membrane: Medial and inferior surfaces of medial cuneiform and base of 1st metatarsal: Deep fibular (peroneal) nerve (L4, L5) Dorsiflexes ankle and inverts foot Extensor hallucis longus