336 FASCLE AND MUSCLES OF THE HORSE 
is inserted into the fibular and fourth tarsal bones. The lateral tendon gives off 
a branch which forms a loop around the long extensor tendon (Fig. 293). 
Relations.—Superficially, the long extensor; deeply, the tibialis anterior. The 
anterior tibial vessels cross the deep face of the outer branch. 
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Medial ridge of trochlea of femur 
Lateral ridge of trochlea of femur 
Lateral femoro-tibial ligament 
1 1 Medial meniscus 
vateral Meniscus 
Lateral condyle of tibia Medial femoro-tibial ligament 
Long extensor (stump) 
Peroneus tertius 
Tibialis anterior 
Lateral extensor 
Tendon of long extensor 
Annular ligament 
Peroneus tertius 
Medial tendon of tibialis anterior 
Tendinous loo e 7 , me es 3 
E f (Re - Anterior tendon of tibialis anterior 
} > i> : ; 
, 5 Th Pe Anterior tendon of peroneus tertius 
Extensor brevis iW 
Annular ligament 
Mt. UII 
Tendon of lateral extensor 
Tendon of long extensor 
Fic. 293.—Musc.ies oF Ricut Lec or Horse; Front View. 
The greater part of the long extensor has been removed. 1, 2, 3, Stumps of patellar ligaments; 4, tuberosity of tibia. 
4. Tibialis anterior.'—This lies on the dorso-lateral face of the tibia; it is wide 
and flattened above, pointed below. 
Origin.—The lateral condyle and border of the tibia and a small area on the 
lateral surface of the tuberosity. 
1 This is also known as the muscular part of the flexor metatarsi. 
