Anatomy, Surgical and topographical -- Atlases; Surgery -- Atlases; Surgery, Operative -- Atlases
By removing the fascia from the front of the leg and foot, we expose the
several muscles and tendons which are situated in these parts. In the
upper part of the leg the tibialis anticus, A, Plate 67, Figure 2, and
extensor-communis muscle, B, are adherent to the fascia which covers
them, and to the intermuscular septum which divides them. In the lower
part of the leg where these muscles and the extensor pollicis, C,
terminate in tendons, a b c, they are readily separable from one
another. The tibialis anticus lies along the outer side of the tibia,
from which, and from the head of the fibula and interosseous ligament,
it arises tendinous and fleshy. This muscle is superficial in its whole
length; its tendon commencing about the middle of the leg, passes in a
separate loose sheath of the annular ligament in front of the inner
ankle, to be inserted into the inner side of the cuneiform bone and base
of the metatarsal bone of the great toe. The extensor communis digitorum
lies close to the outer side of the anterior tibial muscle, and arises
from the upper three-fourths of the fibula, from the interosseous
ligament and intermuscular septum. At the lower part of the leg, this
muscle ends in three or four flat tendons, which pass through a ring of
the annular ligament, and extending forwards, b b b b, over the dorsum
of the foot, become inserted into the four outer toes. The peronaeus
tertius or anterior, is that part of the common extensor muscle which is
inserted into the base of the fifth metatarsal bone. On separating the
anterior tibial and common extensor muscles, we find the extensor
pollicis, C c, which, concealed between the two, arises from the middle
of the fibula, and the interosseous ligament; its tendon passes beneath
the annular ligament in front of the ankle joint, and after traversing
the inner part of the dorsum of the foot, becomes inserted into the
three phalanges of the great toe. Beneath the tendons of the extensor
communis on the instep, will be seen the extensor digitorum brevis, K K,
lying in an oblique direction, between the upper and outer part of the
os calcis, from which it arises, and the four inner toes, into each of
which it is inserted by a small flat tendon, which joins the
corresponding tendon of the long common extensor.
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