. The anatomy of the domestic animals. Veterinary anatomy. THE FIBULA 117 patellar ligaments. A semicircular smooth notch, the sulcus muscularis, separates the tuberosity from the lateral condyle, antl gives passage to the common tendon of origin of the extensor digitalis longus and the peroneus tertius. The distal extremity (Extremitas distalis) is much smaller than the proximal one; it is r|uadrangular in form and larger medially than laterally. It presents an articular surface (Cochlea tibiis), which is adapted to the trochlea of the tibial tarsal bone, and consists of two grooves separated
. The anatomy of the domestic animals. Veterinary anatomy. THE FIBULA 117 patellar ligaments. A semicircular smooth notch, the sulcus muscularis, separates the tuberosity from the lateral condyle, antl gives passage to the common tendon of origin of the extensor digitalis longus and the peroneus tertius. The distal extremity (Extremitas distalis) is much smaller than the proximal one; it is r|uadrangular in form and larger medially than laterally. It presents an articular surface (Cochlea tibiis), which is adapted to the trochlea of the tibial tarsal bone, and consists of two grooves separated by a ridge. The ritlge and grooves are directed obliquely forward and laterally, and are bounded on either side by the malleoli, to which the collateral ligaments of the hock joint an* at- tached. A shallow synovial fossa is usually present on the middle of the articular ridge. The lateral groove is wider antl shallower than the medial one; it is fre- quently marked by a line or groove which indicates the former demarcation between the tibia and fibula. The medial malleolus (Malleolus medialis) is the more prom- inent of the two, and forms the anterior l)oundary of a groove for the tendon of the flexor digitalis longus. The lateral malleolus (Malleolus lateralis) is broader, and is marked by a vertical groove for the passage of the lateral extensor tendon. Development.—The tibia has the usual three chief centers of ossification and supplementary ones for the tuberosity and the lateral malleolus. The latter is really the distal end of the fibula; it is a separate piece at birth, and the line of union is commonly quite evident in the adult in the articular groove. The proxi- mal end unites with the shaft at about three and a half years, and the distal end at about two years of Fig. 9S.—Proximal Extrenmty of Right Tibia of Horse; End View. 1, Medial condyle; 2, lateral condyle; 3, groove ?"on 2 for popliteus tendon; 4, popliteal notch; 5. tuber- osity; 0, groove fo
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphiladelphialondon
