IP of the 1st Phalanx of the Hand

Parent Structures

• Joints of the Hand

Joint Classification

• Hinge
• Synovial

Joint Actions

• Flexion
  • Innervator
    • C8
    • C7
  • Agonist
    • Flexor Pollicis Longus
• Extension
  • Innervator
    • C8
    • C7
  • Agonist
    • Extensor Pollicis Longus

Bones

• Distal Phalanx of the Thumb
• Proximal Phalanx of the Thumb

Articulating Surfaces

• Base of Distal Phalanx of the Thumb
• Head of Proximal Phalanx of the Thumb

Ligaments

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