Lateralized alpha-band cortical networks regulate volitional modulation of beta-band sensorimotor oscillations.
Identifieur interne : 001074 ( Main/Exploration ); précédent : 001073; suivant : 001075Lateralized alpha-band cortical networks regulate volitional modulation of beta-band sensorimotor oscillations.
Auteurs : Mathias Vukeli [Allemagne] ; Robert Bauer [Allemagne] ; Georgios Naros [Allemagne] ; Ilias Naros [Allemagne] ; Christoph Braun [Allemagne] ; Alireza Gharabaghi [Allemagne]Source :
- NeuroImage [ 1095-9572 ] ; 2014.
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Abstract
Sensorimotor rhythms (SMRs) are oscillatory brain activities in the α- and β-bands across the sensorimotor regions of the brain. Each frequency band has its own specific function. The α-band oscillations are closely related to intrinsic cortical networks, whereas oscillations in the β-band are relevant for the information transfer between the cortex and periphery, as well as for visual and proprioceptive feedback. This study aimed to investigate the interaction between these two frequency bands, under the premise that the regional modulation of β-band power is linked to a cortical network in the α-band. We therefore designed a procedure to maximize the modulation of β-band activity over the sensorimotor cortex by combining kinesthetic motor-imagery with closed-loop haptic feedback. The cortical network activity during this procedure was estimated via the phase slope index in electroencephalographic recordings. Analysis of effective connectivity within the α-band network revealed an information flow between the precentral (premotor and primary motor), postcentral (primary somatosensory) and parietal cortical areas. The range of β-modulation was connected to a reduction of an ipsilateral sensorimotor and parietal α-network and, consequently, to a lateralization of this network to the contralateral side. These results showed that regional sensorimotor oscillatory activity in the β-band was regulated by cortical coupling of distant areas in the α-band.
DOI: 10.1016/j.neuroimage.2013.10.003
PubMed: 24121086
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Each frequency band has its own specific function. The α-band oscillations are closely related to intrinsic cortical networks, whereas oscillations in the β-band are relevant for the information transfer between the cortex and periphery, as well as for visual and proprioceptive feedback. This study aimed to investigate the interaction between these two frequency bands, under the premise that the regional modulation of β-band power is linked to a cortical network in the α-band. We therefore designed a procedure to maximize the modulation of β-band activity over the sensorimotor cortex by combining kinesthetic motor-imagery with closed-loop haptic feedback. The cortical network activity during this procedure was estimated via the phase slope index in electroencephalographic recordings. Analysis of effective connectivity within the α-band network revealed an information flow between the precentral (premotor and primary motor), postcentral (primary somatosensory) and parietal cortical areas. The range of β-modulation was connected to a reduction of an ipsilateral sensorimotor and parietal α-network and, consequently, to a lateralization of this network to the contralateral side. These results showed that regional sensorimotor oscillatory activity in the β-band was regulated by cortical coupling of distant areas in the α-band.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country><region><li>Bade-Wurtemberg</li><li>District de Tübingen</li></region><settlement><li>Tübingen</li></settlement></list><tree><country name="Allemagne"><region name="Bade-Wurtemberg"><name sortKey="Vukeli, Mathias" sort="Vukeli, Mathias" uniqKey="Vukeli M" first="Mathias" last="Vukeli">Mathias Vukeli</name></region><name sortKey="Bauer, Robert" sort="Bauer, Robert" uniqKey="Bauer R" first="Robert" last="Bauer">Robert Bauer</name><name sortKey="Braun, Christoph" sort="Braun, Christoph" uniqKey="Braun C" first="Christoph" last="Braun">Christoph Braun</name><name sortKey="Gharabaghi, Alireza" sort="Gharabaghi, Alireza" uniqKey="Gharabaghi A" first="Alireza" last="Gharabaghi">Alireza Gharabaghi</name><name sortKey="Naros, Georgios" sort="Naros, Georgios" uniqKey="Naros G" first="Georgios" last="Naros">Georgios Naros</name><name sortKey="Naros, Ilias" sort="Naros, Ilias" uniqKey="Naros I" first="Ilias" last="Naros">Ilias Naros</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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