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Polio "handwalker" pulling himself to a semi-standing position using a chair

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Case of Austrian pediatrician Heinrich Lehndorff (1908). Note the extreme lumbar lordosis, reflecting a combination of weakness and hip contractures.

Sources:
Zappert J. Die Epidemie der Poliomyelitis acuta epidemica. [Heine-Medinsche. Krankheit] in Wien und Nieder-Oester reich. Jahre 1908.
Oppenheim H. Text-book of nervous disease for physicians and students: authorized translation by Alexander Bruce. 5th edition. Edinburgh: Otto Schultze & Co, 1911;1:209.

See also: Lanska DJ. A human quadrupedal gait following poliomyelitis: From the Dercum-Muybridge collaboration [1885]. Neurology 2016;86:872-6.