Radial collateral ligament of thumb

Radial collateral ligament (thumb)
From	first metacarpal head
To	proximal phalanx of the thumb
Anatomical terminology

The radial collateral ligament of the thumb extends from the first metacarpal head to the proximal phalanx of the thumb. It is located on the radial side of the joint and is weaker than the ulnar collateral ligament of the thumb.