Lateral Slip Anatomy

Description:

  • The lateral slips are parts of the dorsal extensor mechanism at the PIP joint. 
  • These tendon slips pass from the radial and ulnar side of the extensor digitorum communis to the the radial and ulnar conjoined lateral bands at the PIP joint.
  • By attaching to the lateral bands, the lateral slips contribute extension forces to the terminal extensor tendon which extends the DIP joint.
Diagrams & Photos
  • Note the lateral slips (yellow).
    Note the lateral slips (yellow).
Key Points
  • The lateral slips reinforce the extensor hood of the PIP joint and help keep the lateral bands dorsal to the axis of motion at the PIP joint.
Anatomy References
Anatomic Abbreviations
Hand Surgery Resource Anatomy Diagnostic Guide (Chapter)