Bone
Attaching Structures as Insertion
- 1st Palmar Interossei of the Hand - Dorsal Digital Expansion
- Abductor Pollicis Brevis - Radial Side
- Adductor Pollicis - Medial Side – The Tendon contains a sesamoid bone
- Collateral Ligaments of the 1st MCP - Palmar Aspect of the side
- Extensor Pollicis Brevis - Dorsal Surface
- Flexor Pollicis Brevis - Radial Side
- Palmar Ligament of the 1st MCP - Anterior Aspect