帕金森病患者躯体呈前倾前屈姿势,行走时上肢协同摆动动作消失或减少,起动和终止均有困难,步距缩小,这种特殊步态称为( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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