* 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. | * 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. |