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Atlas of Neurology—A Case-based Approach
by Satish V Khadilkar, Kalyan B BhattacharyyaThis is a unique sign found in Parkinson’s disease. As the patient is pushed back he maintains that posture till he falls at the end. This is a sign of rigidity of the flexors of the trunk. A related sign is the oblique sign, where the patient assumes an oblique posture when tilted back, the head not falling on the bed.
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