Midcarpal Joint

Question 1

Type of Joint

Answer 1

Synovial complex saddle between distal and proximal carpal rows, capable of 2 degrees of freedom
Flex/Ext
Abd/Add

Question 2

Articular Surfaces

Answer 2

Concave surface of lunate and triquetral and slightly convex distal surface of scaphoid
Laterally trapezium and trapezoid articulate with scaphoid
Centrally head of capitate articulates with scaphoid and lunate
Medially hamate articulates with lunate and triquetral

Capsule consists of irregular bands of fibres
-palmar/dorsal intercarpal ligts

Question 3

Supporting Ligaments

Answer 3

CLs- strengthen capsule
Radial- between scaphoid and trapezium
Ulnar- between triquetrum and hamate

Intercarpal-
Palmar (ant)- between capitate and prox row
Dorsal (post)- between prox and distal rows