Asymmetry in corticomotor facilitation revealed in right-handers in the context of haptic discrimination.
Identifieur interne : 001D73 ( Main/Merge ); précédent : 001D72; suivant : 001D74Asymmetry in corticomotor facilitation revealed in right-handers in the context of haptic discrimination.
Auteurs : Jean-Michel Cormier [Canada] ; François TremblaySource :
- Laterality [ 1464-0678 ] ; 2013.
English descriptors
- KwdEn :
- Adult, Analysis of Variance, Discrimination (Psychology) (physiology), Electromyography, Evoked Potentials, Motor (physiology), Female, Functional Laterality (physiology), Hand (innervation), Humans, Male, Motor Cortex (physiology), Muscle Contraction (physiology), Rest, Touch (physiology), Transcranial Magnetic Stimulation, Young Adult.
- MESH :
- innervation : Hand.
- physiology : Discrimination (Psychology), Evoked Potentials, Motor, Functional Laterality, Motor Cortex, Muscle Contraction, Touch.
- Adult, Analysis of Variance, Electromyography, Female, Humans, Male, Rest, Transcranial Magnetic Stimulation, Young Adult.
Abstract
In this study we asked whether asymmetries related to handedness in right-handers (n=10) and left-handers (n=10) could influence hemispheric motor facilitation when the preferred or less-preferred hand is engaged in haptic sensing. Transcranial magnetic stimulation (TMS) was used to assess corticomotor excitability when young participants performed a precision grip under two conditions, i.e., with or without a haptic sensing component. In the grip condition participants were required to grasp a 5-mm thick plate between thumb and index fingers, whereas in the haptic condition they performed the same action but were also required to make judgements about the plate's thickness, i.e., either thin (5 mm) or thick (10 mm). Analysis of task-related variations in motor evoked potentials (MEP) amplitude recorded in hand muscles revealed a significant task×hand/hemisphere interaction only in the group of right-handers when the left hand/right hemisphere was engaged in haptic sensing as opposed to simply gripping. Collectively, these results are congruent with other TMS reports describing a greater degree of hemispheric asymmetry in right-handers, who are typically more strongly lateralised than left-handers. Our results with regard to a rightward hemispheric asymmetry for MEP facilitation with haptic sensing are also congruent with the predominant role ascribed to the right sensorimotor cortex in the processing of proprioceptive information.
DOI: 10.1080/1357650X.2012.701631
PubMed: 22746101
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pubmed:22746101Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Asymmetry in corticomotor facilitation revealed in right-handers in the context of haptic discrimination.</title><author><name sortKey="Cormier, Jean Michel" sort="Cormier, Jean Michel" uniqKey="Cormier J" first="Jean-Michel" last="Cormier">Jean-Michel Cormier</name><affiliation wicri:level="1"><nlm:affiliation>School of Rehabilitation Sciences, University of Ottawa, Ottawa, ON, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>School of Rehabilitation Sciences, University of Ottawa, Ottawa, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author><author><name sortKey="Tremblay, Francois" sort="Tremblay, Francois" uniqKey="Tremblay F" first="François" last="Tremblay">François Tremblay</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2013">2013</date><idno type="doi">10.1080/1357650X.2012.701631</idno><idno type="RBID">pubmed:22746101</idno><idno type="pmid">22746101</idno><idno type="wicri:Area/PubMed/Corpus">000B77</idno><idno type="wicri:Area/PubMed/Curation">000B77</idno><idno type="wicri:Area/PubMed/Checkpoint">000968</idno><idno type="wicri:Area/Ncbi/Merge">002106</idno><idno type="wicri:Area/Ncbi/Curation">002106</idno><idno type="wicri:Area/Ncbi/Checkpoint">002106</idno><idno type="wicri:Area/Main/Merge">001D73</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Asymmetry in corticomotor facilitation revealed in right-handers in the context of haptic discrimination.</title><author><name sortKey="Cormier, Jean Michel" sort="Cormier, Jean Michel" uniqKey="Cormier J" first="Jean-Michel" last="Cormier">Jean-Michel Cormier</name><affiliation wicri:level="1"><nlm:affiliation>School of Rehabilitation Sciences, University of Ottawa, Ottawa, ON, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>School of Rehabilitation Sciences, University of Ottawa, Ottawa, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author><author><name sortKey="Tremblay, Francois" sort="Tremblay, Francois" uniqKey="Tremblay F" first="François" last="Tremblay">François Tremblay</name></author></analytic><series><title level="j">Laterality</title><idno type="eISSN">1464-0678</idno><imprint><date when="2013" type="published">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Analysis of Variance</term><term>Discrimination (Psychology) (physiology)</term><term>Electromyography</term><term>Evoked Potentials, Motor (physiology)</term><term>Female</term><term>Functional Laterality (physiology)</term><term>Hand (innervation)</term><term>Humans</term><term>Male</term><term>Motor Cortex (physiology)</term><term>Muscle Contraction (physiology)</term><term>Rest</term><term>Touch (physiology)</term><term>Transcranial Magnetic Stimulation</term><term>Young Adult</term></keywords><keywords scheme="MESH" qualifier="innervation" xml:lang="en"><term>Hand</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Discrimination (Psychology)</term><term>Evoked Potentials, Motor</term><term>Functional Laterality</term><term>Motor Cortex</term><term>Muscle Contraction</term><term>Touch</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Analysis of Variance</term><term>Electromyography</term><term>Female</term><term>Humans</term><term>Male</term><term>Rest</term><term>Transcranial Magnetic Stimulation</term><term>Young Adult</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In this study we asked whether asymmetries related to handedness in right-handers (n=10) and left-handers (n=10) could influence hemispheric motor facilitation when the preferred or less-preferred hand is engaged in haptic sensing. Transcranial magnetic stimulation (TMS) was used to assess corticomotor excitability when young participants performed a precision grip under two conditions, i.e., with or without a haptic sensing component. In the grip condition participants were required to grasp a 5-mm thick plate between thumb and index fingers, whereas in the haptic condition they performed the same action but were also required to make judgements about the plate's thickness, i.e., either thin (5 mm) or thick (10 mm). Analysis of task-related variations in motor evoked potentials (MEP) amplitude recorded in hand muscles revealed a significant task×hand/hemisphere interaction only in the group of right-handers when the left hand/right hemisphere was engaged in haptic sensing as opposed to simply gripping. Collectively, these results are congruent with other TMS reports describing a greater degree of hemispheric asymmetry in right-handers, who are typically more strongly lateralised than left-handers. Our results with regard to a rightward hemispheric asymmetry for MEP facilitation with haptic sensing are also congruent with the predominant role ascribed to the right sensorimotor cortex in the processing of proprioceptive information.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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