You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Wheelchair sign is seen in? and explain in detail?
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.