1st Metacarpophalangeal Joint (1st MCP)

Parent Structures

• Joints of the Hand

Joint Classification

• Condyloid
• Synovial

Joint Actions

• Flexion
  • Innervator
    • C8
    • C7
  • Agonist
    • Flexor Pollicis Longus
    • Flexor Pollicis Brevis
    • 1st Palmar Interossei of the Hand
• Extension
  • Innervator
    • C8
    • C7
  • Agonist
    • Extensor Pollicis Longus
    • Extensor Pollicis Brevis

Bones

• 1st Metacarpal
• Proximal Phalanx of the Thumb

Articulating Surfaces

• Base of Proximal Phalanx of the Thumb
• Head of 1st Metacarpal

Ligaments

• Collateral Ligaments of the 1st MCP
• Palmar Ligament of the 1st MCP