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The gastrocnemius muscle is prone to spasms, which are painful, involuntary contractions of the muscle that may last several minutes. [ 5 ] A severe ankle dorsiflexion force may result in a Medial Gastrocnemius Strain (MGS) injury of the muscle, commonly referred to as a "torn" or "strained" calf muscle, which is acutely painful and disabling.
Origin Insertion Innervation 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 ...
lateral supracondylar ridge of femur above lateral head of gastrocnemius: calcaneal tendon (medial side, deep to gastrocnemius tendon) sural arteries: tibial nerve: plantarflexes ankle, flexes knee: tibialis anterior: 2 1 popliteus: Lower Limb, Leg, Posterior compartment, Deep middle facet of lateral surface of lateral femoral condyle
The superficial portion (the gastrocnemius) gives off two heads attaching to the base of the femur directly above the knee. The deep (profundus) mass of muscle (the soleus) forms the remaining head which attaches to the superior posterior area of the tibia. The triceps surae is innervated by the tibial nerve, specifically, nerve roots L5–S2.
The plantaris muscle arises from the inferior part of the lateral supracondylar ridge of the femur at a position slightly superior to the origin of the lateral head of gastrocnemius. It passes posterior to the knee joint in an inferomedial direction and becomes tendinous distally to insert into the Achilles tendon.
In some animals, such as the rabbit, it is fused for much of its length with the gastrocnemius muscle. The soleus is a complex, multi-pennate muscle in humans, normally having a separate (posterior) aponeurosis from the gastrocnemius muscle. Most soleus muscle fibers originate from each side of the anterior aponeurosis, attached to the tibia ...
The first category includes movements such as standing calf raises, donkey calf raises and stair calves. The second category includes movements that maintain a bent knee, such as seated calf raises. Movements with a straight knee will target the gastrocnemius muscle more, and movements with a bent-knee will target the soleus muscle more.
The plantaris closely follows the lateral head of the gastrocnemius. Its tendon runs between those of the soleus and gastrocnemius and is embedded in the medial end of the calcaneus tendon. [32] In the deep layer, the tibialis posterior has its origin on the interosseus membrane and the neighbouring bone areas and runs down behind the medial ...