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Elsevier
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Base of First Metacarpal Bone
Skeletal System

Base of First Metacarpal Bone

Basis ossis primi metacarpi

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Description

The base of first metacarpal bone is the expanded, saddle-shaped, proximal end of the bone. It is the proximal continuation of its body, contains a proximal articular facet, and provides an insertion site for the abductor pollicis longus muscle. It also provides attachment sites for the palmar and dorsal metacarpal ligaments.

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