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Total traveled way measured by the center of pressure during a dynamic walking test consisting of 3 stereotyped steps “in tandem,” eyes open, in 3 patients (A–C) with mild asymptomatic hyponatremia before (left) and after (right) correction. Patients are walking from right to left. Markedly irregular paths of the center of pressure were observed in the hyponatremia condition (arrows). Redrawn from Renneboog B et al (409). © Elsevier Inc.
