4th Metacarpophalangeal Joint (4th MCP)

Parent Structures

• Joints of the Hand

Joint Classification

• Condyloid
• Synovial

Joint Actions

• Abduction
  • Innervator
    • C8
    • T1
  • Agonist
    • 4th Dorsal Interossei of the Hand
• Adduction
  • Innervator
    • C8
    • T1
  • Agonist
    • 3rd Palmar Interossei of the Hand
• Extension
  • Innervator
    • C8
    • C7
  • Agonist
    • Extensor Digitorum
• Flexion
  • Innervator
    • C8
    • C7
  • Agonist
    • Flexor Digitorum Superficialis
    • Flexor Digitorum Profundus
    • 3rd Lumbrical of the Hand
    • 3rd Palmar Interossei of the Hand
    • 4th Dorsal Interossei of the Hand

Bones

• 4th Metacarpal
• 4th Proximal Phalanx of the Hand

Articulating Surfaces

• Base of 4th Proximal Phalanx of the Hand
• Head of 4th Metacarpal

Ligaments

• 2nd Deep Transverse Ligament of the MCP
• 3rd Deep Transverse Ligament of the MCP
• Collateral Ligaments of the 4th MCP
• Palmar Ligament of the 4th MCP