Título Altered phase and nonphase EEG activity expose impaired maintenance of a spatial-object attentional focus in multiple sclerosis patients
Autores Vazquez-Marrufo, M. , Sarrias-Arrabal, E. , Martin-Clemente, R. , GALVAO CARMONA, ALEJANDRO, Navarro, G. , Izquierdo, G.
Publicación externa No
Medio Sci. Rep.
Alcance Article
Naturaleza Científica
Cuartil JCR 1
Cuartil SJR 1
Impacto JCR 4.38000
Impacto SJR 1.24000
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096722895&doi=10.1038%2fs41598-020-77690-y&partnerID=40&md5=c5219837ada898fa0adf3b9c6ea9c52c
Fecha de publicacion 26/11/2020
ISI 000596329600077
Scopus Id 2-s2.0-85096722895
DOI 10.1038/s41598-020-77690-y
Abstract Some of the anatomical and functional basis of cognitive impairment in multiple sclerosis (MS) currently remains unknown. In particular, there is scarce knowledge about modulations in induced EEG (nonphase activity) for diverse frequency bands related to attentional deficits in this pathology. The present study analyzes phase and nonphase alpha and gamma modulations in 26 remitting-relapsing multiple sclerosis patients during their participation in the attention network test compared with twenty-six healthy controls (HCs) matched in sociodemographic variables. Behavioral results showed that the MS group exhibited general slowing, suggesting impairment in alerting and orienting networks, as has been previously described in other studies. Time-frequency analysis of EEG revealed that the gamma band was related to the spatial translation of the attentional focus, and the alpha band seemed to be related to the expectancy mechanisms and cognitive processing of the target. Moreover, phase and nonphase modulations differed in their psychophysiological roles and were affected differently in the MS and HC groups. In summary, nonphase modulations can unveil hidden cognitive mechanisms for phase analysis and complete our knowledge of the neural basis of cognitive impairment in multiple sclerosis pathology.
Palabras clave adult; attention; electroencephalography; female; hospital service; human; male; middle aged; multiple sclerosis; neuropsychological test; orientation; pathophysiology; physiology; procedures; reactio
Miembros de la Universidad Loyola

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