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“A propensity to bend the trunk forward” and “the chin is now almost immovably bent down upon the sternum” were described by James Parkinson in patients with Parkinson’s disease (PD). The term “dropped head” was first reported in “Gerlier disease” in Switzerland and ‘kubisagari’ in Japan and since then also reported in myositis, myopathy, myasthenia gravis, amyotrophic lateral sclerosis, neuropathy,...
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