Hand-digital articulations

Metacarpophalangeal joint (MCP joints) -

Biaxial ellipsoid joints

Metacarpal head articulating with the -

• corresponding proximal phalanx (i.e. 2nd metacarpal head with the proximal phalanx of the index finger)

Metacarpophalangeal joint (MCP joints) movements -

Flexion, extension,, and abduction/adduction

Interphalangeal Joints:

(PIP and DIP)

• Uniaxial hinge joint

Proximal interphalangeal joint (PIP):

• head of proximal phalanx articulating with base and middle phalanx 

Distal interphalangeal joint (DIP):

•  Head middle phalanx articulating with the base of the distal phalanx

Interphalangeal Joints (PIP and DIP) movements:

Flexion and extension

P1:

Proximal phalanx

P2:

Middle phalanx

 P3:

 Distal phalanx