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Imagining is not doing but involves specific motor commands: a review of experimental data related to motor inhibition

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Show simple item record Guillot, Aymeric Di Rienzo, Frank MacIntyre, Tadhg E. Moran, Aidan P. Collet, Christine 2014-05-01T14:41:50Z 2014-05-01T14:41:50Z 2012
dc.description peer-reviewed en_US
dc.description.abstract There is now compelling evidence that motor imagery (MI) and actual movement share common neural substrate. However, the question of how MI inhibits the transmission of motor commands into the efferent pathways in order to prevent any movement is largely unresolved. Similarly, little is known about the nature of the electromyographic activity that is apparent during MI. In addressing these gaps in the literature, the present paper argues that MI includes motor execution commands for muscle contractions which are blocked at some level of the motor system by inhibitory mechanisms. We first assemble data from neuroimaging studies that demonstrate that the neural networks mediating MI and motor performance are not totally overlapping, thereby highlighting potential differences between MI and actual motor execution.We then review MI data indicating the presence of subliminal muscular activity reflecting the intrinsic characteristics of the motor command as well as increased corticomotor excitability. The third section not only considers the inhibitory mechanisms involved during MI but also examines how the brain resolves the problem of issuing the motor command for action while supervising motor inhibition when people engage in voluntary movement during MI.The last part of the paper draws on imagery research in clinical contexts to suggest that some patients move while imagining an action, although they are not aware of such movements. In particular, experimental data from amputees as well as from patients with Parkinson’s disease are discussed.We also review recent studies based on comparing brain activity in tetraplegic patients with that from healthy matched controls that provide insights into inhibitory processes during MI. We conclude by arguing that based on available evidence, a multifactorial explanation of motor inhibition during MI is warranted. en_US
dc.language.iso eng en_US
dc.publisher Frontiers en_US
dc.relation.ispartofseries Frontiers in Human Neuroscience;6, Article 247
dc.rights This Document is Protected by copyright and was first published by Frontiers. All rights reserved. it is reproduced with permission en_US
dc.subject motor imagery en_US
dc.subject motor command inhibition en_US
dc.subject motor performance en_US
dc.subject mental processes en_US
dc.subject electromyography en_US
dc.subject sensorimotor control en_US
dc.title Imagining is not doing but involves specific motor commands: a review of experimental data related to motor inhibition en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1409138

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