Cortical correlates of response time slowing in older adults: ERP and ERD/ERS analyses during passive ankle movement

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dc.contributor.author Toledo, Diana R.
dc.contributor.author Manzano, Gilberto M. [UNIFESP]
dc.contributor.author Barela, Jose A.
dc.contributor.author Kohn, Andre F.
dc.date.accessioned 2018-07-26T17:30:23Z
dc.date.available 2018-07-26T17:30:23Z
dc.date.issued 2016
dc.identifier http://dx.doi.org/10.1016/j.clinph.2015.05.003
dc.identifier.citation Clinical Neurophysiology. Clare, v. 127, n. 1, p. 655-663, 2016.
dc.identifier.issn 1388-2457
dc.identifier.uri http://repositorio.unifesp.br/handle/11600/46060
dc.description.abstract Objectives: The response time (RT) to kinesthetic perception has been used as a proprioceptive measurement, for example, in older individuals. However, the RT cannot provide information on impairments at specific stages of the respective sensorimotor processing. In the present study, electroencephalographic (EEG) signals were recorded during passive ankle movement with and without an associated perceptual task of movement detection. The main purpose was to analyze differences between young and older adults both in terms of RT and cortical responses. Putative differences in the latter were expected to point to changes in the processing associated with neural pathways or cortical regions in the older subjects. Methods: The EEG activity of nineteen older (OA, 65-76 years) and 19 young adults (YA, 21-32 years) was recorded during passive ankle movement, without motor voluntary response (NVR, sensory condition), and during a condition with voluntary motor response (VR, with measurement of the RT). Event-related potentials (ERP) and beta event-related desynchronization/synchronization (ERD/ERS) were recorded and analyzed in both experimental conditions. Results: The RT in OA was larger than in YA (P < 0.0001). EEG analyses showed that the N1 amplitude was larger in the VR than in the NVR condition (P = 0.006), whereas no difference for latency was obtained between conditions (P = 0.376). Comparisons between the groups revealed attenuated (P = 0.019) and delayed (P = 0.001) N1 in the OA group, irrespective of the condition (no interaction group vs condition). Only OA showed correlations between RT and N1, with significant correlation for both amplitude (r = -0.603, P = 0.006) and latency (r = 0.703, P = 0.001). The ERD/ERS analyses revealed a task-dependent group effect: in NVR, significant differences were obtained only for the ERS amplitude, which was attenuated in OA (P = 0.003). In VR, larger (P = 0.004) and delayed (P = 0.003) ERD and attenuated (P = 0.029) and delayed (P = 0.017) ERS peaks were observed in the older group. Conclusions: The results suggest that a larger response time to proprioceptive stimuli in older adults is associated with a weaker and delayed proprioceptive afferent inflow to the cortex. In this scenario, older adults would need a higher cognitive effort (larger ERD) to process the sensory inputs when attempting to properly perform a sensorimotor task. Significance: ERP and ERD/ERS measurements during kinesthetic assessment provide new insights on identification of the origin of sensorimotor slowing in older adults. (C) 2015 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved. en
dc.description.sponsorship Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorship Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent 655-663
dc.language.iso eng
dc.publisher Elsevier Ireland Ltd
dc.relation.ispartof Clinical Neurophysiology
dc.rights Acesso restrito
dc.subject Aging en
dc.subject Proprioception en
dc.subject Passive movement en
dc.subject Event-related potential en
dc.subject Beta ERD/ERSAge-Related-Changes en
dc.subject Event-Related Potentials en
dc.subject Beta Eeg-Changes en
dc.subject Evoked-Potentials en
dc.subject Motor Cortex en
dc.subject Corticomotor Excitability en
dc.subject Stance Perturbation en
dc.subject Spatial Attention en
dc.subject Nerve-Conduction en
dc.subject Postural Control en
dc.title Cortical correlates of response time slowing in older adults: ERP and ERD/ERS analyses during passive ankle movement en
dc.type Artigo
dc.description.affiliation Univ Sao Paulo, Neurosci Program, EP USP, PTC, BR-05508900 Sao Paulo, SP, Brazil
dc.description.affiliation Univ Sao Paulo, Biomed Engn Lab, EP USP, PTC, Ave Prof Luciano Gualberto,Travessa 3,158, BR-05508900 Sao Paulo, SP, Brazil
dc.description.affiliation Univ Fed Sao Paulo, Div Neurol, Sao Paulo, Brazil
dc.description.affiliation Univ Cruzeiro Sul, Inst Phys Act & Sport Sci, Sao Paulo, Brazil
dc.description.affiliation Univ Cruzeiro Sul, Grad Program Human Movement Sci, Sao Paulo, Brazil
dc.description.affiliation Sao Paulo State Univ, Inst Biosci, Rio Claro, Brazil
dc.description.affiliationUnifesp Univ Fed Sao Paulo, Div Neurol, Sao Paulo, Brazil
dc.description.sponsorshipID FAPESP: 2011/17193-0
dc.description.sponsorshipID CNPq: 303313/2011-0
dc.description.sponsorshipID CNPq: 2009/09286-9
dc.description.sponsorshipID FAPESP: 2013/14667-7
dc.identifier.doi 10.1016/j.clinph.2015.05.003
dc.description.source Web of Science
dc.identifier.wos WOS:000367540800078



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