IV. INTERNAL MUSCLES OF THE THIGH

The =sartorius= arises by two heads, one from the tendon of the psoas

minor and the iliac fascia, the other from the shaft of the ilium. The

femoral vessels pass between them.

The =gracilis= is more extensively united with its fellow than in the

horse.

[Illustration:

FIG. 221.—LEFT TARSUS OF OX WITH SYNOVIAL SHEATHS AND BURSÆ INJECTED,

EXTERNAL VIEW.

_1_, Peroneus tertius; _1′_, tendon of _1_ and its sheath, _1″_; _2_,

extensor digiti tertii proprius; _2′_, tendon of _2_; _2″_, common

sheath of tendons of extensor digiti tertii and extensor digitalis

longus (_3_, _3′_); _4_, peroneus longus and its sheath, _4′_; _5_,

extensor digiti quarti and its sheath, _5′_; _6_, tendon of

gastrocnemius; _7_, superficial digital flexor and its sheath, _7′_;

_8_, tendon of tibialis anterior; _a_, tibia; _b_, proximal annular

ligament; _c_, tarsus; _d_, distal annular ligament; _e_,

metatarsus; _f_, external lateral ligament. (After Schmidtchen.)

]

[Illustration:

FIG. 222.—LEFT TARSUS OF OX WITH SYNOVIAL SHEATHS AND BURSÆ INJECTED,

INTERNAL VIEW.

_1_, Peroneus tertius; _2_, tendon of tibialis anterior with sheath,

_2′_, and bursa, _2″_; _3_, long digital flexor and _3′_, its

sheath; _4_, tibialis posterior; _5_, deep digital flexor and its

sheath, _5′_; _6_, tendon of gastrocnemius and bursa, _6′_; _7_,

superficial digital flexor and its sheath, _7′_; _8_, subcutaneous

bursa; _a_, tibia; _b_, proximal annular ligament; _c_, tarsus; _d_,

metatarsus. (After Schmidtchen.)

]

The =pectineus= is large, and arises by a single head from the pubic

crest and prepubic tendon. It divides into two branches, one of which is

inserted as in the horse, while the other extends to the internal

epicondyle of the femur.

The =adductor= resembles that of the horse, but does not reach to the

internal condyle.

The =quadratus femoris= and =obturator externus= resemble those of the

horse.

The =obturator internus= arises from the ischium only, and its tendon

passes through the obturator foramen.

The =gemellus= is large.

A text-book of veterinary anatomy · 第 393 / 1619 题