The pivot joint between your radius and ulna allow you to rotate your palm forward or anteriorly in a motion called supination, and turning it backward or posteriorly is called pronation.
桡骨和尺骨之间的枢轴关节允许你在一个叫做旋后的动作中向前或向前旋转手掌，向后或向后旋转叫做内旋。
Pivot joints
原声例句
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Pivot joint
（重定向自Pivot joints）
![](/Images/godic/202502/03/Gelenke_Zeichnung015537.jpg")
A pivot joint (trochoid joint, rotary joint, lateral ginglymus) is a type of synovial joint. In pivot joints, the axis of a convex articular surface is parallel with the longitudinal axis of the bone.
According to one classification system, a pivot joint like the other synovial joint —the hinge joint has one degree of freedom.