Cranialis and the peroneus longus. The extensor digitorum longus then emerges from between them, one third of the way down the tibia. It becomes tendinous before reaching the ankle joint, and then travels alongside the tendon of the tibialis cranialis for a short distance. The tendon of the tibialis cranialis soon moves away, veering to the inside of the ankle. Notion 3 Keygens on this page. The tendon of the extensor digitorum longus then separates into four tendons, one for each toe. In the feline, the belly of the tibialis cranialis is wider and descends lower than in the dog, thereby covering more of the extensor digitorum longus, which closely adheres to it. HDD Low Level Format Tool 4 25.

This leaves the outer part of the lower portion of the extensor digitorum longus visible on the sur- face. The muscle fibers of the belly continue down to the level of the ankle joint before it becomes tendinous. INDIVIDUAL MUSCLES » REAR LIMB 103 HORSE OX DOG Extensor digitorum lateralis HORSE (Peroneus) • Origin: Outer surface of the upper end of the tibia, outer surface of the fibula, wide ligament between the tibia and the fibula, and the ligament on the outside of the knee joint between the femur and the fibula. • Insertion: Into the tendon of the extensor digitorum longus, one third of the way down the metatarsal, therefore ultimately into the three toe bones.

• Action: Assists the extensor digitorum longus in extending the toe bones. • Structure: The extensor digitorum lateralis has an elongated, flattened belly located on the outside of the lower leg. The belly begins at the level of the knee joint and becomes tendinous at the lower end of the tibia.

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The tendon passes through a shallow groove on the outside of the lower end of the tibia, passes over the spool of the adjacent tarsal bone, and then angles forward. Xsplit License Keygen on this page. It veers inwardly in its descent and then merges with the tendon of the extensor digitorum longus.

OX • Origin: Outer surfaces of the upper end of the tibia and the vestigial head of the fibula, and the ligament on the outside of the knee between the femur and the tibia. • Insertion: Upper front end of the middle toe bone of the outer toe.

• Action: Extends the upper two toe joints of the outer toe. • Structure: Similar to that in the horse, but the tendon continues inde- pendently all the way down to the toe. DOG AND FELINE • Origin: Dog: Front surface of the upper third of the shaft of the fibula. Feline: Outer surface of the upper half of the shaft of the fibula. • Insertion: Into the tendon of the extensor digitorum longus to the out- ermost toe, therefore ultimately into the last toe bone.

• Action: Extends the toe bones of the outermost toe; pulls the outer- most toe away from the foot. • Structure: The extensor digitorum lateralis is a small muscle lying deep in the lower leg.

In the dog, only its tendon comes to the surface on the lower half of the outer side of the lower leg, where it lies between the tendons of the peroneus longus in front and the peroneus brevis behind. In the feline, some of the lower part of the muscular belly can be seen on the surface. The tendon hooks behind the lower end of the fibula, along with, but in front of, the tendon of the peroneus brevis. It passes under the tendon of the peroneus longus, and then descends along the outer edge of the front surface of the foot. It merges into the tendon of the extensor digitorum longus on top of the upper toe bone. 104 INDIVIDUAL MUSCLES >REAR LIMB OX DOG Peroneus longus (Fibularis longus) OX • Origin: Outer surface of the upper end of the tibia, and the ligament connecting the femur to the tibia. • Insertion: Upper end of the inner rear corner of the large metatarsal bone and the adjacent tarsal bone above it.