48 當帕金森氏病人在晚期開始出現運動阻滯（motor block）時，進行下列何種動作比較不受影響？

上樓梯 走平地 過旋轉門 進出電梯門

ans A

there is no proximal muscle weakness

that is what this question want to ask

bradykinesia and rigidity - cogwheel. seen in parkinson!