Functional localization and effective connectivity of cortical theta and alpha oscillatory activity during an attention task

Clinical Neurophysiology Practice
Yuichi KitauraToshihiko Kinoshita

Abstract

The aim of this paper is to investigate cortical electric neuronal activity as an indicator of brain function, in a mental arithmetic task that requires sustained attention, as compared to the resting state condition. The two questions of interest are the cortical localization of different oscillatory activities, and the directional effective flow of oscillatory activity between regions of interest, in the task condition compared to resting state. In particular, theta and alpha activity are of interest here, due to their important role in attention processing. We adapted mental arithmetic as an attention ask in this study. Eyes closed 61-channel EEG was recorded in 14 participants during resting and in a mental arithmetic task ("serial sevens subtraction"). Functional localization and connectivity analyses were based on cortical signals of electric neuronal activity estimated with sLORETA (standardized low resolution electromagnetic tomography). Functional localization was based on the comparison of the cortical distributions of the generators of oscillatory activity between task and resting conditions. Assessment of effective connectivity was based on the iCoh (isolated effective coherence) method, which provides an appropriat...Continue Reading

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Citations

Jul 4, 2019·Experimental Brain Research·Emma P ShawRodolphe J Gentili
Jul 4, 2020·Brain Research Bulletin·Reza KazemiShunichiro Ikeda
Sep 26, 2020·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Chiara MassulloClaudio Imperatori

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Software Mentioned

sLORETA
iCoh
LORETA

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