Full Gastrocnemius Muscle (Medial Belly) Description
[Continued from above] . . . (a strong, flat tendon) formed by the junction of the two gastrocnemius muscles and the soleus muscle in the lower middle of the calf. Thereby, it draws the heel upward, flexing the foot powerfully to extend the front of the foot and propel the body forward in walking, running, or jumping. The gastrocnemius muscle originates behind the knee (patella), and it performs a lesser role in flexing the leg at the knee joint. The tibial nerve serves and commands the muscle.