半徑(半徑)在近端處具有徑向頭(人均半徑)具有平坦凹部 - 用於與肱骨髁的頭部鉸接關節窩(凹窩關節突)。頭部周圍被關節周圍(周圍關節腔)佔據,其與尺骨的徑向切口關節連接。頭部下面的骨骼區域是半徑的頸部(股骨半徑)。在骨頭前內側的子宮頸下面是半徑(tuberositas半徑)的結節 - 肱二頭肌腱的肩部附著點。在橈骨遠端,從其內側開始,尺骨切口(尺骨尺側)與尺骨頭相連。從骨的外側,莖突(莖突狀突起)從下方離開。在橈骨遠端有一個凹陷的腕關節表面(腕關節腕骨關節),用於與兩個腕骨(舟骨和半月)的關節。在可見凹槽的後表面上,其粘附肌肉的肌腱。
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