The influence of task characteristics on younger and older adult motor overflow

The Quarterly Journal of Experimental Psychology : QJEP
Patricia K AddamoNellie Georgiou-Karistianis

Abstract

This study investigated the influence of attentional and motor demands on motor overflow in 17 healthy young (18-35 years) and 17 older adults (60-80 years). Participants performed a finger pressing task by exerting either 33% or 66% of their maximal force output using their dominant or nondominant hand. Overflow was concurrently recorded in the passive hand. Attention was manipulated via a tactile stimulus presented to one or both hands for certain trials. Results showed that older adults exhibited greater overflow than young adults and that the effect of target force was exacerbated in older adults. Further, only older adult overflow was increased when tactile stimulation was directed to one or both hands. Increased overflow in older adults may result from bilateral cortical activation that is influenced by increased task demands. To perform comparatively to younger adults, older adults may compensate for age-related brain changes by recruiting an increased cortical network.

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Citations

Mar 7, 2013·Journal of Neurology·Sze-Cheen LowNellie Georgiou-Karistianis
Apr 17, 2013·Journal of Neurology·Anne-Marie TernesNellie Georgiou-Karistianis
Apr 12, 2011·Journal of Motor Behavior·Patricia K AddamoNellie Georgiou-Karistianis
Jan 11, 2013·Neural Plasticity·Vincent BeauléHugo Théoret
Jan 23, 2016·Human Movement Science·Peter LeinenStefan Panzer
Oct 30, 2010·Brain and Cognition·Patricia K AddamoNellie Georgiou-Karistianis
Nov 4, 2008·Brain and Cognition·Patricia K AddamoNellie Georgiou-Karistianis
Mar 29, 2011·Behavioural Brain Research·Keith M McGregorBruce Crosson
Jul 19, 2013·The American Journal of Psychology·Patricia K AddamoNellie Georgiou-Karistianis
May 25, 2013·Neurocase·S Lee HongElizabeth B Torres
Nov 8, 2016·Neurobiology of Aging·Catharina ZichCornelia Kranczioch
Jan 1, 2012·Brain Sciences·Keith M McGregorAndrew J Butler
Apr 11, 2012·Developmental Psychobiology·Kasey C SoskaKaren E Adolph

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