About: Alertness fluctuations during task performance modulate cortical evoked responses to transcranial magnetic stimulation

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An Entity of Type : schema:ScholarlyArticle, within Data Space : covidontheweb.inria.fr associated with source document(s)

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type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
title	Alertness fluctuations during task performance modulate cortical evoked responses to transcranial magnetic stimulation
Creator	Bekinschtein, Tristan Canales-Johnson, Andrés Chennu, Srivas Kamke, Marc Mattingley, Jason »more»
source	BioRxiv
abstract	Transcranial magnetic stimulation (TMS) has been widely used in human cognitive neuroscience to examine the causal role of distinct cortical areas in perceptual, cognitive and motor functions. However, it is widely acknowledged that the effects of focal cortical stimulation on behaviour can vary substantially between participants and even from trial to trial within individuals. Here we asked whether spontaneous fluctuations in alertness can account for the variability in behavioural and neurophysiological responses to TMS. We combined single-pulse TMS with neural recording via electroencephalography (EEG) to quantify changes in motor and cortical reactivity with fluctuating levels of alertness defined objectively on the basis of ongoing brain activity. We observed rapid, non-linear changes in TMS-evoked neural responses – specifically, motor evoked potentials and TMS-evoked cortical potentials – as EEG activity indicated decreasing levels of alertness, even while participants remained awake and responsive in the behavioural task. IMPACT STATEMENT A substantial proportion of inter-trial variability in neurophysiological responses to TMS is due to spontaneous fluctuations in alertness, which should be controlled for during experimental and clinical applications of TMS.
has issue date	2019-06-28(xsd:dateTime)
bibo:doi	10.1101/155754
has license	biorxiv
sha1sum (hex)	05709a910b2c8db2945155c7c24d1009e83fc802
schema:url	https://doi.org/10.1101/155754
resource representing a document's title	Alertness fluctuations during task performance modulate cortical evoked responses to transcranial magnetic stimulation
schema:publication	bioRxiv
resource representing a document's body	covid:05709a910b2c8db2945155c7c24d1009e83fc802#body_text
is schema:about of	named entity 'focal' named entity 'cognitive neuroscience' named entity 'human' named entity 'activity' named entity 'cortical' »more»

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