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Phalanges - Horse Anatomy (view source)
Revision as of 14:44, 29 October 2012
, 14:44, 29 October 2012→Distal Phalanx
The distal phalanx is rounded to a point distally; articulating with another bone only at the proximal end. It does not have a cortex or medullary cavity, but has three surfaces: articular surface, parietal surface and solar surface.
The distal phalanx is rounded to a point distally; articulating with another bone only at the proximal end. It does not have a cortex or medullary cavity, but has three surfaces: articular surface, parietal surface and solar surface.
:The proximal '''articular surface''' has two concavities separated by a ridge. The palmar border meets with the distal sesamoid (navicular) bone. The dorsal aspect has a marked '''extensor process''', where the common digital extensor attaches.
:The proximal '''articular surface''' has two concavities separated by a ridge. The palmar border meets with the distal sesamoid (navicular) bone. The dorsal aspect has a marked '''extensor process''', where the [[Tendons - Horse Anatomy#Thoracic Limb|common digital extensor]] attaches.
:The '''solar surface''' has two distinct areas, the more palmar area is the roughened flexor surface and the remainder is smooth, concave and crescent-shaped. There is a '''solar groove''' on each side of the flexor surface, which leads to the '''solar canal'''. The palmar aspect extends either side to form the medial and lateral '''palmar processes''', which each have a foramen. The junction between the solar surface and the parietal surface forms the solar border. There is a notch in the dorsal solar border, known as the '''crena marginis solearis'''.
:The '''solar surface''' has two distinct areas, the more palmar area is the roughened flexor surface and the remainder is smooth, concave and crescent-shaped. There is a '''solar groove''' on each side of the flexor surface, which leads to the '''solar canal'''. The palmar aspect extends either side to form the medial and lateral '''palmar processes''', which each have a foramen. The junction between the solar surface and the parietal surface forms the solar border. There is a notch in the dorsal solar border, known as the '''crena marginis solearis'''.