Muscles of the Posterior Region It will not be unprofitable to recall to mind that, in man, the muscles of this region are arranged in two layers: a superficial layer consisting of the gastrocnemius and soleus, to which is added a muscle of little importance, the plantaris, and a deep layer formed by four muscles-the popliteus, flexor longus digitorum, tibialis posticus, and flexor longus pollicis.
"Artistic Anatomy of Animals"
Édouard Cuyer
In quadrupeds, it rises as high as the back of the knee, and is found blended with the plantaris.
"Artistic Anatomy of Animals"
Édouard Cuyer