Visual and proprioceptive inputs on spatial orientation in the pitch dimension.
Emmert, Antonia C.
Mitchell, Thomas M.
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The purpose of this study was to determine the relative influence of visual and proprioceptive inputs on judgments of body orientation by assessing the effects of initial starting body position (SP), visual field variation (VFV), and trial sequence (T). Subjects, secured to a 360 degree rotating bed surrounded by a tilting box, attempted to orient themselves to vertical and horizontal body positions under light and dark conditions. SP was either ±15 degrees from vertical or horizontal. When subjects placed themselves horizontal, they were affected by VFV, and had a head-high mean deviation of ±1.45 degrees from horizontal. When subjects placed themselves vertical, they were affected by SP and T, and had a head-back mean deviation of -2.94 degrees from vertical.
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