Changes

**The accessory bone serves as a landmark for palpation

**The accessory bone serves as a landmark for palpation

*Distally, bones are numbered 1-5, though 5 is always fused with 4

*Distally, bones are numbered 1-5, though 5 is always fused with 4

*A small [[Bones and Cartilage - Anatomy & Physiology#Types of Bone|'''sesamoid''']] bone embedded in the medial tissues of the joint can sometimes be mistaken as a chip fracture

*A small [[Bones - Anatomy & Physiology#Types of Bone|'''sesamoid''']] bone embedded in the medial tissues of the joint can sometimes be mistaken as a chip fracture

===Metacarpal bones===

===Metacarpal bones===

===Metacarpal Joint===

===Metacarpal Joint===

The metacarpal joint is defined by the presence of palmar [[Bones and Cartilage - Anatomy & Physiology#Types of Bone|'''sesamoids''']], which allow the flexor tendons to pass over the sharp change in angle presented by the joint.  These are paired on each digit, with the exception of the first digit where it exists.

The metacarpal joint is defined by the presence of palmar [[Bones - Anatomy & Physiology#Types of Bone|'''sesamoids''']], which allow the flexor tendons to pass over the sharp change in angle presented by the joint.  These are paired on each digit, with the exception of the first digit where it exists.