- Metacarpophalangeal joint
Metacarpophalangeal joint Metacarpophalangeal articulation and articulations of digit. Volar aspect. Metacarpophalangeal articulation and articulations of digit. Ulnar aspect. Latin articulationes metacarpophalangeae Gray's subject #90 332 MeSH Metacarpophalangeal+Joint
The metacarpophalangeal joints (MCP) 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 first phalanges, with the exception of that of the thumb, which presents more of the characters of a ginglymoid joint. Arthritis of the MCP is a distinguishing feature of Rheumatoid Arthritis, as opposed to the distal interphalangeal joint in osteoarthritis.
Each joint has:
- palmar ligaments of metacarpophalangeal articulations
- collateral ligaments of metacarpophalangeal articulations
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:
Location Flexion Extension fingers Flexor digitorum superficialis and profundus, lumbricales, and interossei, assisted in the case of the little finger by the flexor digiti minimi brevis extensor digitorum communis, extensor indicis proprius, and extensor digiti minimi muscle thumb flexores pollicis longus and brevis extensores pollicis longus and brevis
- Hand kinesiology at UK bone/mpartic.html
- EatonHand joi-047
- Metacarpophalangeal+joint at eMedicine Dictionary
Joints and ligaments of upper limbs (TA A03.5, GA 3.313) Shoulder ElbowRadial collateralUlnar collateralAnular · Oblique cord Forearm Joints of handMetacarpophalangealCollateral · PalmarCollateral · PalmarOther
anat(h/c, u, t, l)/phys
noco(arth/defr/back/soft)/cong, sysi/epon, injr
proc, drug(M01C, M4)
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