The metacarpophalangeal joints
) are situated between the metacarpal
bones and the proximal phalanges
of the digits.
These joints are of the condyloid
kind, formed by the reception of the rounded heads of the metacarpal
bones into shallow cavities on the proximal ends of the proximal phalanges
Being condyloid, they allow the movements of flexion, extension, abduction, adduction and circumduction at the joint.
Each joint has:
The dorsal surfaces of these joints are covered by the expansions of the Extensor tendons, together with some loose areolar tissue which connects the deep surfaces of the tendons to the bones.
The movements which occur in these joints are flexion, extension, adduction, abduction, and circumduction; the movements of abduction and adduction are very limited, and cannot be performed while the fingers form a fist.
The muscles of flexion and extension are as follows:
Arthritis of the MCP is a distinguishing feature of rheumatoid arthritis, as opposed to the distal interphalangeal joint in osteoarthritis.
This page was last edited on 11 February 2018, at 23:36.
under CC BY-SA license.