Hand · Long bone
Metacarpal Bones (Palm)
The metacarpals are the five long bones that form the palm of the hand, connecting the wrist to the fingers. The knuckles are the tops of these bones.
What it is
The metacarpals are five miniature long bones in the palm, one leading to each finger and the thumb.
Where it is
The palm, between the wrist bones and the finger bones.
What it does
Form the framework of the palm, allow the hand to grip and cup, and give the knuckles their shape.
Connections
Joints and connections
- Joints with the wrist bones
- Knuckle joints (with the finger bones)
When things go wrong
Common injuries and conditions
- Metacarpal fracture — a "boxer's fracture" of the little-finger metacarpal is common after punching
Education and reference only. This explains the anatomy in plain terms; it is not a diagnosis. A severe injury, a visibly deformed limb, or the inability to move or bear weight needs urgent assessment — call 999 or go to A&E for a serious injury.
Did you know?
An interesting fact
The prominent knuckles you see when you make a fist are the heads of the metacarpal bones.
Answers
Metacarpal Bones: frequently asked questions
What are the metacarpals?
The metacarpals are the five bones of the palm, connecting the wrist to the fingers. Their tops form the knuckles.
Explore the hand
Related bones
Sources
Where this is drawn from
- NHS — Anatomy and body systems
- Gray's Anatomy for Students (Drake, Vogl, Mitchell)
- TeachMeAnatomy — skeletal system
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