The visual control of stability in children and adults: postural readjustments in a ground optical flow

Experimental Brain Research
Bernard BaumbergerMichelangelo Flückiger

Abstract

The aim of this research was to analyse the development of postural reactions to approaching (AOF) and receding (ROF) ground rectilinear optical flows. Optical flows were shaped by a pattern of circular spots of light projected on the ground surface by a texture flow generator. The geometrical structure of the projected scenes corresponded to the spatial organisation of visual flows encountered in open outdoor settings. Postural readjustments of 56 children, ranging from 7 to 11 years old, and 12 adults were recorded by the changes of the centre of foot pressure (CoP) on a force platform during 44-s exposures to the moving texture. Before and after the optical flows exposure, a 24-s motionless texture served as a reference condition. Effect of ground rectilinear optical flows on postural control development was assessed by analysing sway latencies (SL), stability performances and postural orientation. The main results that emerge from this experiment show that postural responses are directionally specific to optical flow pattern and that they vary as a function of the motion onset and offset. Results showed that greater developmental changes in postural control occurred in an AOF (both at the onset and offset of the optical flo...Continue Reading

Citations

Jan 25, 2008·Experimental Brain Research·Isabelle OlivierVincent Nougier
Oct 4, 2005·Journal of Neuroengineering and Rehabilitation·Maurizio SchmidTommaso D'Alessio
Nov 28, 2013·PloS One·Layla AjrezoMaria Pia Bucci
Oct 5, 2011·Journal of Experimental Child Psychology·Jeffrey M HaddadRichard E A Van Emmerik
Dec 22, 2009·Gait & Posture·Martin LemayUNKNOWN Montreal Tourette Study Group
Oct 31, 2015·Gait & Posture·Valentina AgostiniMarco Knaflitz
Nov 23, 2006·Gait & Posture·Fabrizio PecoraroAndrea Macaluso
Oct 18, 2006·The European Journal of Neuroscience·S M Palmer, M G P Rosa
Jan 31, 2006·Human Movement Science·Laure LejeuneMarianne Barbu-Roth
Apr 12, 2011·Psychiatry Research·Daniela CaldirolaGiampaolo Perna

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