Effects of distance and gaze position on postural stability in young and old subjects

Experimental Brain Research
Zoï Kapoula, Thanh-Thuan Lê

Abstract

Visual stabilization of posture is known to improve when the distance to target fixation decreases; this is attributed to increased angular size of retinal slip induced by body sway. At near distance, however, the eyes converge and efferent or afferent oculomotor signals could also be involved in posture stabilization. The goal of this study is to test whether the distance effect exists for both young and elderly and to test the role of vergence itself and of gaze position. Eighteen young (25.3 years) and 17 elderly (61.6 years) subjects were asked to fixate a target in quiet stance presented either at close (40 cm) or at far distance (200 cm); the vergence angle was 9 degrees and 2 degrees , respectively. For each distance, three gaze positions were studied straight-ahead (0 degrees ), 15 degrees up or down. We found a decrease in the surface of center of pressure (CoP), of standard deviation of antero-posterior and lateral body sway and of speed variance at near distance that occurs for both young and elderly. At far distance, the surface of CoP is smaller for 15 degrees up or down gaze in comparison with straight-ahead position, but at near distance there is no such gaze position effect. In an additional experiment, subjects...Continue Reading

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Citations

Aug 7, 2007·Journal of Neurology·Zoï Kapoula, Maria Pia Bucci
Jul 23, 2013·Journal of Neuroengineering and Rehabilitation·Amanda Y Schafer, Ksenia I Ustinova
Oct 19, 2010·Attention, Perception & Psychophysics·Michael N GeussNicholas R Stevens
Nov 21, 2013·Experimental Brain Research·Osamu AokiKazuhisa Domen
Mar 31, 2015·BioMed Research International·Alessandro Marco De NunzioNicola Pappone
Sep 2, 2008·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Eric Matheron, Zoï Kapoula
Sep 11, 2007·Auris, Nasus, Larynx·Frederic ReyZoï Kapoula
Aug 22, 2007·Neuroscience Letters·Eric MatheronZoï Kapoula
Apr 1, 2014·Vision Research·Anna Przekoracka-KrawczykKrzysztof Piotr Michalak
Mar 9, 2012·Brain and Behavior·Ki Ustinova, J Perkins
Aug 3, 2007·Gait & Posture·Thanh-Thuan Lê, Zoï Kapoula
Feb 26, 2011·Gait & Posture·Jean-Philippe HainautBenoît Bolmont
Apr 11, 2015·Frontiers in Human Neuroscience·Zoï KapoulaPaul Locher
Aug 11, 2006·Vision Research·Thanh-Thuan Lê, Zoï Kapoula
Apr 26, 2016·Neuroscience Letters·Anna DickmannIrene Aprile
Jun 1, 2016·Frontiers in Human Neuroscience·Arnaud Foisy, Zoï Kapoula
May 19, 2007·Gerontology·Janina M PradoMarcos Duarte
Jul 7, 2018·Physiotherapy Theory and Practice·Jean M BerlinerMargaret Schenkman
Nov 10, 2018·PloS One·Natalia CooperGeorg F Meyer
Mar 14, 2020·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Sang-Yeob KimDong-Sik Yu
Jul 17, 2020·Neurorehabilitation and Neural Repair·Franchino PorciunculaAshwini K Rao
Dec 6, 2019·I-Perception·Kanon Fujimoto, Hiroshi Ashida
Aug 18, 2020·BioMed Research International·María Carmen Sánchez-GonzálezManuel Rebollo-Salas
Jul 22, 2019·European Journal of Applied Physiology·Eneida Yuri SudaThomas Graven-Nielsen
Oct 27, 2018·Brain Sciences·Osamu AokiShinichiro Morishita
May 2, 2021·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Katarzyna PrzekorackaAnna Przekoracka-Krawczyk
May 8, 2021·Royal Society Open Science·Yogev KorenSimona Bar-Haim

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