1st CMC Joint Classification etc

• Small Joints of Hand - 1st Carpometacarpal Joint - Joint Classification:

  • Synovial Saddle joint

  A) 1st carpometacarpal

  
• Small Joints of Hand - 1st Carpometacarpal Joint - Axis of movement:

  • Varies (see movements)

  A) 1st carpometacarpal

  
• Small Joints of Hand - 1st Carpometacarpal Joint - Articular Surfaces:

  • Trapezium (convex medial to lateral/ concave palmar to dorsal)
  • Base of 1st metacarpal (MC) is reciprocal
  • Surfaces covered in hyaline cartilage

  A) 1st carpometacarpal

  
• Small Joints of Hand - 1st Carpometacarpal Joint - Joint Capsule:

  • Loose but strong, attaching to articular margins
  • Thickened by radial carpometacarpal ligament (laterally) and anterior and posterior oblique ligaments (anteriorly/posteriorly)

  A) 1st carpometacarpal