Base of 5th Proximal Phalanx of the Hand

Bone

• 5th Proximal Phalanx of the Hand

Attaching Structures as Insertion

• 4th Palmar Interossei of the Hand - Dorsal Digital Expansion
• Collateral Ligaments of the 5th MCP - Palmar Aspect of the side
• Flexor Digiti Minimi Brevis - On the Ulna Side
• Palmar Ligament of the 5th MCP - Anterior Margin

Joints

• 5th Metacarpophalangeal Joint (5th MCP)