Gastronemius

[Gr.gaster, the stomach; kneme, the leg.] ( Anat.) The belly or calf of the leg; the term is also applied to two of the muscles of that part. The gastromemius extern us arises by two distinct heads from the inner and outer condyles of the os femoris, which unite a little below the joint, and below it unites with the gastromemius intern us, to form the tendon Achilles. The gastronemius intern us, called also the soleus, is situated immediately under the above, and rises by two heads from the posterior part of the head of the fibula and the upper and posterior part of the tibia. The use of both these muscles is the same; namely, to raise the heel and extend the foot.