Page 259 - Adams and Stashak's Lameness in Horses, 7th Edition

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Figure 3.47. (Continued) Lateromedial (LM) projection of the 8. Superimposed medial and lateral tuberosities on the proximal
metacarpophalangeal joint. (a) Third metacarpal bone, (b) proximal palmar aspect of the proximal phalanx for ligamentous
sesamoid bone, and (c) proximal phalanx. attachment.
1. Sagittal ridge on the distal extremity of the third metacarpal bone. 9. Sagittal groove on the proximal articular surface of the proximal
2. Apex of the superimposed proximal sesamoid bones. phalanx, which articulates with the sagittal ridge of the third
3. Articular surface of the proximal sesamoid bones. metacarpal bone.
4. Articular surface of the superimposed medial and lateral 10. Midpalmar surface of the proximal phalanx located between the
condyles of the third metacarpal bone. lateral and medial tuberosities.
5. Superimposed base of the proximal sesamoid bones. 11. Palmar surface of the proximal phalanx, where the middle
6. Transverse ridge on the distal articular surface of the third (oblique) distal sesamoidean ligament attaches.
metacarpal bone, which divides the distal metacarpal articular 12. Superimposed medial and lateral bony eminences for attach­
surface into dorsal and palmar areas. It varies in size and visibility. ment of the extensor tendon on the proximal phalanx.
7. Superimposed medial and lateral articular fovea of the proximal
phalanx.

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