[Illustration:
FIG. 201.—MUSCLES OF LOWER PART OF THIGH, LEG, AND FOOT OF HORSE,
EXTERNAL VIEW.
_o′_, Fascia lata; _q_, _q′_, _q″_, biceps femoris; _r_,
semitendinosus; _21′_, external condyle of tibia. (After
Ellenberger-Baum, Anat. für Künstler.)
]
The muscles of this region cover almost all of the tibia except its
internal face, which is largely subcutaneous. As in the forearm, the
muscles fall into two groups, an anterior or dorso-lateral, and a
posterior or plantar. The muscles of the first group are extensors of
the digit and flexors of the hock, those of the second have the opposite
action.