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American neurologist Silas Weir Mitchell (1829 to 1914)

In the early 1880s, Mitchell developed a postural sway meter, which he employed in routine clinical practice. In the late 1880s, he also contributed to the development of a mechanism to graphically record postural sway and to Guy Hinsdale’s more sophisticated posturography apparatus. (Photograph courtesy of the National Library of Medicine.)

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