Bone
Attaching Structures as Origin
- Adductor Pollicis - Oblique Head
- Dorsal Metacarpal Ligaments - Posteriorly between the 3rd and 4th Metacarpal
- Palmar Metacarpal Ligaments - Anteriorly between the 3rd and 4th Metacarpal
Attaching Structures as Insertion
- Dorsal Carpometacarpal Ligament
- Dorsal Metacarpal Ligaments - Posteriorly between the 4th and 5th Metacarpal
- Interosseous Ligament of the Common Carpometacarpal Ligament
- Palmar Carpometacarpal Ligament
- Palmar Metacarpal Ligaments - Anteriorly between the 4th and 5th Metacarpal