Central Slip Anatomy

Description

  • The central slip of the extensor tendon attaches to the base of the middle phalanx, playing a crucial role in extending the PIP joint of the finger.
Diagrams & Photos
  • Central slip
Key Points
  • The central slip can be lacerated, ruptured or attenuated secondary to disease like rheumatoid arthritis.
  • Injury to the central slip can cause a boutonniere deformity by decreasing PIP extension and by allowing the lateral bands to be displaced volarly and below the axis of PIP motion.
  • Volarly displaced lateral bands become flexors of the PIP joints.
Anatomy References
Anatomic Abbreviations
Hand Surgery Resource Anatomy Diagnostic Guide (Chapter)