. The anatomy of the horse, a dissection guide. Horses. DISSECTION OF THE ANTERIOR LIMB. 33 The Tendon of the Extensor Pedis (Plate 7). This tendon, after throwing oflf the slip to the extensor suffraginis, descends over the front of the metacarpus and digit, and lies on the middle line. Its play over the anterior ligament of the fetlock is facilitated by a small synovial bursa; while, over the front of the inter- phalangeal joints, the synovial membrane is directly sup- ported by the deep face of the tendon, there being no anterior ligament for these joints. At the middle of the first phalanx
. The anatomy of the horse, a dissection guide. Horses. DISSECTION OF THE ANTERIOR LIMB. 33 The Tendon of the Extensor Pedis (Plate 7). This tendon, after throwing oflf the slip to the extensor suffraginis, descends over the front of the metacarpus and digit, and lies on the middle line. Its play over the anterior ligament of the fetlock is facilitated by a small synovial bursa; while, over the front of the inter- phalangeal joints, the synovial membrane is directly sup- ported by the deep face of the tendon, there being no anterior ligament for these joints. At the middle of the first phalanx the tendon is joined on each side by a strong band which descends obliquely over the side of the fetlock from the suspensory ligament. The tendon is finally inserted into the pyra- midal process of the os pedis. Action.—The first action of the muscle is to extend the third phalanx on the second, and then the second on the first. When contraction is continued it produces suc- cessively extension of the fetlock and of the carpus. Directions.—The tendons on the back of the metacarpus and digit must next be dis- sected ; and, as a preliminary step, the carpal and meta- carpo-phalangeal sheaths formed in connection with these tendons should be ex- amined. Dissection of the Metacarpus and Digit, showing the Tendons and their Synovial Sheaths (Chauveau). 1. Synovial bursa of the extensor metacarpi magnus; 2. Superior cvl-de-sac, or pouch, of the synovial membrane of the carpal sheath ; 21, 21 Inferior part of the same ; 3. Pouch of the radio- carpal synovial membrane, appearing as a hernia between the posterior common ligament and the outermost radio-carpal ligament; 4. Synovial bursa of the extensor pedis; 5. Protrusion of the synovial membrane of the fetlock-joint; 6, 7, 8. Superior, middle, and inferior pouches of the synovial membrane of the metacarpo-phalangeal sheath ; 9. Inferior extremity of the same, exposed by the removal of the reinforcing sheath of the perforans tendo
Size: 938px × 2663px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjecthorses, bookyear1902
