Visual-vestibular integration during self-motion perception in younger and older adults

Psychology and Aging
Robert RamkhalawansinghJennifer L Campos

Abstract

Younger adults integrate visual and vestibular cues to self-motion in a manner consistent with optimal integration; however, little is currently known about whether this process changes with older age. Our objective was to determine whether older adults, like younger adults, display evidence of optimal visual-vestibular integration, including reductions in bimodal variance (Visual + Vestibular) compared with unimodal variance (visual or vestibular alone), and reliability-based cue weighting. We used a motion simulator and a head-mounted display to introduce a 2-interval forced-choice heading estimation task. Older (65+ years) and younger adults (18-35 years) judged which of two movements was more rightward. Movements consisted of vestibular cues (passive movement in darkness), visual cues (optic flow), or both cues combined. The combined condition contained either congruent cues or incongruent cues (either a subtle 5° or larger 20° conflict). Results demonstrated that older adults had less reliable visual heading estimates than younger adults but comparable vestibular heading estimates. During combined, congruent conditions, both age groups exhibited reductions in combined variance, consistent with predicted optimal integration...Continue Reading

Citations

Mar 5, 2020·Journal of Neurophysiology·Raul Rodriguez, Benjamin T Crane
Jun 28, 2020·Nature Reviews. Neurology·Colleen G CanningMoran Gilat
Dec 14, 2018·Frontiers in Cellular Neuroscience·Zhixian Cheng, Yong Gu
Mar 9, 2019·Experimental Brain Research·Raul Rodriguez, Benjamin T Crane
May 30, 2020·PloS One·Sophia NestmannKsander Nikolas de Winkel
Oct 23, 2020·Journal of Aging and Physical Activity·Beatriz Caruso SoaresJosé Eduardo Pompeu
Aug 10, 2020·Human Movement Science·Sophie CarrJennifer L Campos
May 12, 2021·Neurobiology of Aging·Darren M KenneyJudith M Shedden

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