Fourth metacarpal
Os metacarpi IV
SkeletalSkeletonArmLeft and right
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- What it is
- Long bone of the palm behind the ring finger, with a base at the carpus, a slender shaft and a rounded head forming the knuckle.
- Function
- Forms the skeleton of the palm and the knuckle joint of its finger.
- Size
- ≈ 55 mm long
- Clinical note
- The metacarpal heads are the knuckles seen when making a fist.