月骨 - Os lunatum

影像

描述

The lunate bone may be distinguished by its deep concavity and crescentic outline. It is situated in the center of the proximal row of the carpus, between the scaphoid and triangular. The superior surface, convex and smooth, articulates with the radius. The inferior surface is deeply concave, and of greater extent from before backward than transversely: it articulates with the head of the capitate, and, by a long, narrow facet (separated by a ridge from the general surface), with the hamate. The dorsal and volar surfaces are rough, for the attachment of ligaments, the former being the broader, and of a somewhat rounded form. The lateral surface presents a narrow, flattened, semilunar facet for articulation with the scaphoid. The medial surface is marked by a smooth, quadrilateral facet, for articulation with the triquetrum.

The lunate articulates with five bones: the radius proximally, capitate and hamate distally, scaphoid laterally, and triangular medially.


结构高低级

大体解剖 > 骨, 骨骼系统 > 附肢骨骼 > 上肢骨, 自由上肢骨 > Pars libera membri superioris > 手骨 > 腕骨 > 月骨

翻译