The Gastrocnemius. There is another muscle involved in plantar flexion. The soleus and the tibialus posterior maintains the arch. The only one that does both actions, though, is the Gastrocnemius.
The calf muscle on the back of your tibia and fibula bones, along with a few small ones in your foot itself that I'm not sure of the name.Your shin flexes and your calf contracts. THis works the same when pointing your foot.
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The tibialis anterior muscle: this long, thick muscle lies against the lateral surface of the tibia, where it is easy to palpate (feel). It dorsiflexes and inverts the foot.
The gastrocnemius, the large muscle in the calf, flexes the knee and foot.
The gastronemius muscle is one of the calf muscles and it plantar flexes the foot or flexes the knee.
The extensor digitorum longus muscle is responsible for extending the toes (digits) and dorsiflexing the foot at the tarsal joint.
It flexes your knees and allows flexing and movement of your hips. If you pick your foot up and look at the sole of your foot then you are using all the functions of the sartorius muscle.
It plantar flexes the foot at the ankle and flexes the leg at the knee.
The opposite muscle to the tibialis anterior is the gastrocnemius muscle, which is located at the back of the lower leg. The tibialis anterior is responsible for dorsiflexion of the foot (bringing the toes toward the shin), while the gastrocnemius is responsible for plantarflexion of the foot (pointing the toes away from the shin).
The Gastrocnemius and the Soleus flexes the knee and the foot. The Plantaris is an unimportant muscle. Many people do not have it and doctors tend to use this muscle for tendon graphs.
The gastrocnemius muscle is the synergist of plantar flexion of the foot. It works together with the soleus muscle to help push the foot downward and point the toes.
The gastrocnemius, tibialis posterior are the main plantarflexors. However, the flexor digitorium longus and flexor hallicus longus are weak plantarflexors, along with peroneus longus and brevis.