<prompt> Wheelchair sign is seen in?ParkinsonismDuchenne muscular dystrophyBeckers dystrophyThomsen disease  <response>: PARKINSON DISEASE Usage of Levodopa leads to on and off phenomenon. When levodopa stas acting a rigid akinetic wheelchair bound Parkinsonism patient will be in a position to get out of a chair and sta pushing the wheelchair. When the effect wears off the same patient will be restricted to a wheelchair. This is known as wheelchair sign. 