Interphalangeal Joints

Question 1

Type of Joint

Answer 1

Synovial hinge between either head of prox phalanx and base of middle phalanx (PIP), head of prox phalanx and base of distal phalanx (thumb), or head of middle phalanx and base of distal phalanx (DIP)
Capable of 1 degree of freedom
-flex/ext

Question 2

Supporting Ligaments

Answer 2

Strengthened by collateral ligts

Palmar- replaces ant, fibrocartilaginous plate

• from ant margin of bases of distal phalanx
• loosely attached to neck of proximal phalanx via joint capsule