3rd Metacarpal

Parent Structures

• Metacarpals

Bone Classification

• Long

Bony Features

• Base of 3rd Metacarpal
• Head of 3rd Metacarpal
• Shaft of 3rd Metacarpal

Attaching Structures as Origin

• 2nd Dorsal Interossei of the Hand - Lateral Side
• 3rd Dorsal Interossei of the Hand - Medial Side
• Palmar Ligament of the 3rd MCP - Attached to the Neck by the Joint Capsule

Associated Joints

• 3rd Metacarpophalangeal Joint (3rd MCP)
• Common Carpometacarpal Joints

Structures Attaching to Bony Features as Origin

• Base of 3rd Metacarpal
  • Adductor Pollicis - Oblique Head
  • Dorsal Metacarpal Ligaments - Posteriorly between the 2nd and 3rd Metacarpal
  • Palmar Metacarpal Ligaments - Anteriorly between the 2nd and 3rd Metacarpal
• Head of 3rd Metacarpal
  • Collateral Ligaments of the 3rd MCP - Tubercle and Adjacent Depression on the Metacarpal
  • Collateral Ligaments of the 4th MCP - Tubercle and Adjacent Depression on the Metacarpal
• Shaft of 3rd Metacarpal
  • Adductor Pollicis - Transverse Head – Longitudinal Ridge on the Anterior Surface

Structures Attaching to Bony Features as Insertion

• Base of 3rd Metacarpal
  • Dorsal Carpometacarpal Ligament
  • Dorsal Metacarpal Ligaments - Posteriorly between the 3rd and 4th Metacarpal
  • Extensor Carpi Radialis Brevis - Posterior Surface
  • Flexor Carpi Radialis - Palmar Surface
  • Interosseous Ligament of the Common Carpometacarpal Ligament
  • Palmar Carpometacarpal Ligament
  • Palmar Metacarpal Ligaments - Anteriorly between the 3rd and 4th Metacarpal