Motivation and motor control: hemispheric specialization for approach motivation reverses with handedness.

PloS One
Geoffrey Brookshire, Daniel Casasanto

Abstract

According to decades of research on affective motivation in the human brain, approach motivational states are supported primarily by the left hemisphere and avoidance states by the right hemisphere. The underlying cause of this specialization, however, has remained unknown. Here we conducted a first test of the Sword and Shield Hypothesis (SSH), according to which the hemispheric laterality of affective motivation depends on the laterality of motor control for the dominant hand (i.e., the "sword hand," used preferentially to perform approach actions) and the nondominant hand (i.e., the "shield hand," used preferentially to perform avoidance actions). To determine whether the laterality of approach motivation varies with handedness, we measured alpha-band power (an inverse index of neural activity) in right- and left-handers during resting-state electroencephalography and analyzed hemispheric alpha-power asymmetries as a function of the participants' trait approach motivational tendencies. Stronger approach motivation was associated with more left-hemisphere activity in right-handers, but with more right-hemisphere activity in left-handers. The hemispheric correlates of approach motivation reversed between right- and left-hander...Continue Reading

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Citations

Jun 12, 2013·Developmental Psychobiology·George F MichelEmily C Marcinowski
Nov 29, 2014·European Child & Adolescent Psychiatry·D Pérez-GarcíaL A Pérez-Jurado
Apr 3, 2016·Social Cognitive and Affective Neuroscience·Carsten K W De DreuIlja G Sligte
Jun 16, 2016·Frontiers in Psychology·Varsha Singh
Oct 5, 2013·Neuroscience and Biobehavioral Reviews·Sebastian OcklenburgOnur Güntürkün
Sep 22, 2016·International Journal of Psychology : Journal International De Psychologie·Xueru ZhaoLixiang Huang
Oct 30, 2013·Experimental Neurobiology·David Hecht
Jan 3, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Giorgio Vallortigara
Jul 25, 2019·PloS One·Marco FilettiNiklas Ravaja
Jun 20, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Geoffrey Brookshire, Daniel Casasanto
Oct 11, 2019·Royal Society Open Science·Lise HobeikaIsabelle Viaud-Delmon
Jan 7, 2021·Psychological Research·Felice GiulianiDavide Pietroni
Aug 8, 2013·Acta Psychologica·Audrey MilhauDenis Brouillet
Mar 4, 2019·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Chiara NicoliniAimee J Nelson

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Software Mentioned

lme4
FieldTrip package for Matlab
R

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