Perception of the Postural Vertical Following Prolonged Rodily Tilt in Normals and Subjects With Labyrinthine Defects

Abstract

Nine normal men and ten men with defective labyrinthine function were studied in order to determine the effects of prolonged bodily tilt on their perception of the postural vertical. The subjects were tested under two conditions of delay before setting themselves to vertical and four degrees of tilt. A 2 × 2 × 4 analysis of variance showed significantly greater average errors for the labyrinthine defective men, for prolonged delay in recovery to vertical, and for the larger tilts.