Motor system recruitment during action observation: No correlation between mu-rhythm desynchronization and corticospinal excitability

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dc.contributor.authorLapenta O.M.
dc.contributor.authorFerrari E.
dc.contributor.authorBoggio P.S.
dc.contributor.authorFadiga L.
dc.contributor.authorD'Ausilio A.
dc.date.accessioned2024-03-12T23:56:17Z
dc.date.available2024-03-12T23:56:17Z
dc.date.issued2018
dc.description.abstract© 2018 Lapenta et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Observing others’ actions desynchronizes electroencephalographic (EEG) rhythms and modulates corticospinal excitability as assessed by transcranial magnetic stimulation (TMS). However, it remains unclear if these measures reflect similar neurofunctional mechanisms at the individual level. In the present study, a within-subject experiment was designed to assess these two neurophysiological indexes and to quantify their mutual correlation. Participants observed reach-to-grasp actions directed towards a small (precision grip) or a large object (power grip). We focused on two specific time points for both EEG and TMS. The first time point (t1) coincided with the maximum hand aperture, i.e. the moment at which a significant modulation of corticospinal excitability is expected. The second (t2), coincided with the EEG resynchronization occurring at the end of the action, i.e. the moment at which a hypothetic minimum for action observation effect is expected. Results showed a Mu rhythm bilateral desynchronization at t1 with differential resynchronization at t2 in the two hemispheres. Beta rhythm was more desynchronized in the left hemisphere at both time points. These EEG differences, however, were not influenced by grip type. Conversely, motor potentials evoked by TMS in an intrinsic hand muscle revealed an interaction effect of grip and time. No significant correlations between Mu/Beta rhythms and motor evoked potentials were found. These findings are discussed considering the spatial and temporal resolution of the two investigated techniques and argue over two alternative explanations: i. each technique provides different measures of the same process or ii. they describe complementary features of the action observation network in humans.
dc.description.issuenumber11
dc.description.volume13
dc.identifier.doi10.1371/journal.pone.0207476
dc.identifier.issn1932-6203
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35440
dc.relation.ispartofPLoS ONE
dc.rightsAcesso Aberto
dc.titleMotor system recruitment during action observation: No correlation between mu-rhythm desynchronization and corticospinal excitability
dc.typeArtigo
local.scopus.citations16
local.scopus.eid2-s2.0-85056510782
local.scopus.subjectAdult
local.scopus.subjectBiomechanical Phenomena
local.scopus.subjectBrain Mapping
local.scopus.subjectBrain Waves
local.scopus.subjectCortical Excitability
local.scopus.subjectElectroencephalography
local.scopus.subjectElectromyography
local.scopus.subjectFemale
local.scopus.subjectFingers
local.scopus.subjectHand
local.scopus.subjectHumans
local.scopus.subjectMale
local.scopus.subjectNails
local.scopus.subjectTranscranial Magnetic Stimulation
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85056510782&origin=inward
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