3rd Metacarpophalangeal Joint (3rd MCP)

Parent Structures

• Joints of the Hand

Joint Classification

• Condyloid
• Synovial

Joint Actions

• Flexion
  • Innervator
    • C8
    • C7
  • Agonist
    • Flexor Digitorum Superficialis
    • Flexor Digitorum Profundus
    • 2nd Lumbrical of the Hand
    • 2nd Dorsal Interossei of the Hand
    • 3rd Dorsal Interossei of the Hand
• Extension
  • Innervator
    • C8
    • C7
  • Agonist
    • Extensor Digitorum
• Abduction
  • Innervator
    • C8
    • T1
  • Agonist
    • 2nd Dorsal Interossei of the Hand - Lateral Abduction
    • 3rd Dorsal Interossei of the Hand - Medial Abduction

Bones

• 3rd Metacarpal
• 3rd Proximal Phalanx of the Hand

Articulating Surfaces

• Base of 3rd Proximal Phalanx of the Hand
• Head of 3rd Metacarpal

Ligaments

• 1st Deep Transverse Ligament of the MCP
• 2nd Deep Transverse Ligament of the MCP
• Collateral Ligaments of the 3rd MCP
• Palmar Ligament of the 3rd MCP