Skeletal System
Distal Articular Facet of First Metacarpal Bone
Facies articularis distalis ossis primi metacarpi
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The distal articular facet of the first metacarpal bone is the convex, inferior area of its head. It articulates with the proximal articular facet found on the proximal phalanx of the thumb, forming the first metacarpophalangeal joint.
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Metacarpal Bone
The trapezial angle is defined the complement of the angle formed by the intersection of the line parallel to the trapezial articulation and the line parallel to the long axis of the index metacarpal bone.
