Visual Input During Prolonged Lateral TiltPosition: Contribution to the Subjective VisualVertical
Fumiyuki Goto M.D. Ph.D
Department of Otorhinolaryngology, Hino Municipal Hospital, Tamadaira 4-3-1, Hino-shi, Tokyo 191-0062, Japan
Correspondence to Author: Fumiyuki Goto M.D. Ph.D
Objective: The purpose of this study was to look into how
healthy male subjects’ subjective visual verticals (SVV)
changed after prolonged lateral body tilts in both light and
Aim: Both sitting and lying down positions allowed for the
acquisition of static SVVs. The patient was advised to lie
down and remain in that position for the subsequent series
of recordings once the measurement was completed in the
sitting position. SVV was assessed right away and eight more
times at intervals of 15 minutes. Finally, the individual was
placed back in the sitting posture, and the SVV was assessed
both in light and darkness, right away and after 15 minutes.
Conclusion: The subjective awareness of the contralateral
tilt of the real vertical is a phenomenon that may contribute
to maintaining one’s head in the vertical position, according
to a comparison of SVVs in dark and light conditions. We
suggest that one of the key inputs to stabilise visual vertical is
this visual effect. Therefore, sustaining one’s upright position
on earth would require visual input.
Vestibular; Subjective visual vertical; Otolith; Ocular counterrolling
Fumiyuki Goto. Visual Input During Prolonged Lateral TiltPosition: Contribution to the Subjective VisualVertical. Clinical Imaging and Case Reports 2023.