2nd - 5th carpometacarpal joints

Question 1

classification

Answer 1

synovial plane joints

Question 2

axis of movement

Answer 2

complex

Question 3

articular surfaces

Answer 3

2nd - 2nd MC -> trapezoid, little capitate, trapezium
3rd - 3rd MC -> capitate
4th - 4th MC -> hamate and little capitate
5th - 5th MC -> hamate

Question 4

2 features of capsule

Answer 4

shared fibrous capsule across all 4 CMC joints
all lined with synovial membrane

Question 5

ligaments

Answer 5

dorsal carpometacarpal
palmar carpometacarpal
interosseous

Question 6

dorsal carpometacarpal - where and function

Answer 6

distal row of carpal bones -> base of MCs
thickening of capsule on dorsal aspect

Question 7

palmar carpometacarpal - where and function

Answer 7

distal row of carpal bones -> base of MCs
thickening of capsule on palmar aspect

Question 8

interosseous - where

Answer 8

short ligaments from capitate and hamate -> 3rd or 4th MC

Question 9

movement at CMC joints

Answer 9

minimal - small gliding movements only