Joints of the hands

Intercarpal joints

Between carpal bones
Synovial plane
Mvmt: small amount of gliding movements between carpal bones

Intercarpal joint - pisiform

Articulates with the triquetrum
Anchored to the hamate by the pisiform ligament and to the base of the 5th metacarpal by the pisometacarpal ligament

Midcarpal joints

Formed between carpal rows
Hinge type synovial joint
Mvmt: flexion/extension, abduction/adduction

Carpometacarpal joints

Formed between the distal row of carpal bones with the base of metacarpals in the front

Carpometacarpal joints 2-5

Distal rows of carpals, 2-5 metacarpals in front
Plane
Dorsal and palmar CMC ligaments
Mvmt: gliding movement
- 2-3 almost no movement. 4 some. 5 the most

CMC joint of the thumb

Saddle
Mvmt: adduction.abduction, flexion/extension, opposition

Thumb opposition

Phase 1: thumb abduction to position the thumb
Phase 2: opposotion component includes a combination of thumb flexion, adduction and medial rotation

Intermetacarpal joints

Formed between metacarpals 2-3, 3-4, and 4-5
Share joint capsule with CMC joints of fingers
Plane

Metacarpophalangeal joints

Head of metacarpals and base of proximal phalanges in front
Condyloid

MCP joint - collateral ligament tension

Slack during extension and tight during flexion
Causes the MCP joints to simultaneously adduct during flexion

MCP palmar ligaments

In the front, it is fibrocartilaginous

MCP - deep transverse ligament

Connects the palmar ligaments of metacarpals 2-5
Holds the head of the metacarpals together

MCP joint movement

Flexion, extension, abduction, adduction
Thumb: flexion/extension

Interphalangeal joint

Head of phalanges to base of phalanges in front
Hinge