Stance stability with unilateral and bilateral light touch of an external stationary object

Somatosensory & Motor Research
Ruth Dickstein

Abstract

Unilateral light fingertip touch of a stationary object has a significant stabilizing effect on postural sway during stance. The purpose of this study was to find out if this effect is enhanced by bilateral light touch of parallel stationary objects. The postural sway of 54 healthy subjects was tested in four stance conditions: no touch; unilateral left light touch of the left handle of a walker; unilateral right light touch of the right handle of the same walker; and bilateral light touch of the two handles. During testing, subjects stood blindfolded on two foam pads placed on the left and right force plates of the Tetrax balance system. Testing in each condition lasted 45 s and was executed twice in a random order. As expected, postural sway was significantly reduced by unilateral left or right light fingertip touch. It was significantly further decreased by bilateral light touch. In addition, light touch conditions were associated with a reduction in pressure fluctuations between the heel and forefoot of the same foot as well as those of the contralateral foot, with a concomitant increase in weight shift fluctuations between the two feet. The decrease in postural sway with bilateral light touch suggests cortical modulation o...Continue Reading

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Citations

Oct 5, 2011·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Alan M WingSatoshi Endo
Nov 24, 2011·PloS One·Liliana Rincon-GonzalezStephen I Helms Tillery
Nov 23, 2010·Neuroscience·E FranzénF B Horak
Oct 11, 2011·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Liliana Rincon-GonzalezStephen Helms Tillery
Dec 30, 2014·Rehabilitation Nursing : the Official Journal of the Association of Rehabilitation Nurses·Leif JohannsenAlan M Wing
Dec 1, 2012·Gait & Posture·Ksenia I Ustinova, Joseph E Langenderfer
Feb 17, 2007·Journal of Neurophysiology·Leif JohannsenVassilia Hatzitaki
Feb 5, 2010·Journal of Geriatric Physical Therapy·Vicki S MercerDonna D Tedder
Dec 15, 2018·Journal of Geriatric Physical Therapy·Jason L ShawRachel L Mulcahey
Jun 21, 2018·Frontiers in Neuroscience·Renato MoraesEliane Mauerberg-deCastro
Mar 17, 2019·Experimental Brain Research·I-Chieh LeeKarl M Newell

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