Resumen

Background: Oscillations, action, and postsynaptic potentials in glial-neuronal ensembles integrate the spectral power (SP) of electroencephalographic (EEG). Our objective is to propose SP indicators of healthy brains (control groups) based on the default mode and their modifications by habituation and visual-motor association (VM-asso), to support diagnostic and rehabilitation processes. However, important differences seem to exist between men and women. Therefore, we aim to analyze EEG characteristics in a female sample. Subjects and Methods: In the current study, EEG was recorded at rest with closed eyes before and during repeated photostimulations (RPh) and before (pre) and during association of RPh with switch pressing (VM-asso) in 70 female adults. EEG was analyzed using UAM/INR software, which removes artifacts, identifies corresponding signals, selects 20 samples (2-s) fron each condition, applies Welch’s periodogram to calculate and average the absolute power (AP; AAPs) of ᵹ, è, á and â, before and during learning, and emits data to a spreadsheet. Differences in each condition were evaluated using non-parametric tests. Results: The AAPs were different; in habituation, ᵹ and è increased significantly in fronto-frontal (FF) and frontocentral and decreased in the other leads. During association, they increased in FF and decreased in the other three regions. á AAP decreased in all leads except in FF during habituation, and the decrement was lower in the association. â AAP increased in all leads during both learning conditions. Conclusion:The SP and the topographic distribution are descriptive parameters of habituation and VM-asso; we propose them as EEG indicators.

Palabras clave: Narrowband electroencephalographic in habituation and association electroencephalographic descriptive parameters habituation alpha inhibition visual-motor association beta increases evoked/event-related oscillation.

2017-10-31   |   694 visitas   |   Evalua este artículo 0 valoraciones

Vol. 69 Núm.5. Septiembre-Octubre 2017 Pags. 274-285 Rev Invest Clin 2017; 69(5)