Dec. 18, 2020
Nearly 3,000 illustrations, including video clips of neurologic disorders.
Every article is reviewed by our esteemed Editorial Board for accuracy and currency.
Full spectrum of neurology in 1,200 comprehensive articles.
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.)