Changes

====Proximal Interphalangeal Joint====

====Proximal Interphalangeal Joint====

* Movement - flexion and extension.

The proximal interphalangeal joint provides flexion and extension movements. The joint capsule attaches near the articular surfaces of the proximal and middle phalanges and extends slightly in a pouch dorsally and more extensively on the palmar aspect. The dorsal capsule is reinforced by a fibrocartilaginous nodule; the extensor tendon attaches to the capsule here. The '''collateral ligaments''' connect the distal end of the proximal phalanx to the proximal end of the middle phalanx and lie in a vertical direction rather than along the bone axis.

* The joint capsule attaches near the articular surfaces of the proximal and middle phalanges. It extends slightly in a pouch dorsally and more extensively on the palmar aspect. The dorsal capsule is reinforced by a fibrocartilaginous nodule; the extensor tendon attaches to the capsule here.

* '''Collateral ligaments''' - connect the distal end of the proximal phalanx to the proximal end of the middle phalanx. They lie in a vertical direction rather than along the bone axis.

====Distal Interphalangeal Joint====

====Distal Interphalangeal Joint====