Changes

==Distal Sesamoid (Navicular) Bone==

==Distal Sesamoid (Navicular) Bone==

The distal sesamoid in horses is known as the navicular bone. It is elongated transversely and articulates with both the distal and middle phalanx, lying palmar to the distal interphalangeal joint. Dorsally, the articular surface is covered by hyaline cartilage. It articulates with the palmar aspect of the middle phalanx.  The palmar flexor surface is characterised by a prominent '''sagittal ridge''' and is covered by fibrocartilage; providing a smooth surface for the deep digital flexor tendon to glide during weightbearing.  The distal border contains a small articular facet of hyaline cartilage for articulation with the distal phalanx. The distal border contains numerous, synovium-lined, nutrient foraminae.

The distal sesamoid in horses is known as the navicular bone. It is elongated transversely and articulates with both the distal and middle phalanx, lying palmar to the [[Joints and Ligaments - Horse Anatomy#Thoracic Limb|distal interphalangeal joint]]. Dorsally, the articular surface is covered by hyaline cartilage. It articulates with the palmar aspect of the middle phalanx.  The palmar flexor surface is characterised by a prominent '''sagittal ridge''' and is covered by fibrocartilage; providing a smooth surface for the deep digital flexor tendon to glide during weightbearing.  The distal border contains a small articular facet of hyaline cartilage for articulation with the distal phalanx. The distal border contains numerous, synovium-lined, nutrient foraminae.

===Ligamentous Support===

===Ligamentous Support===