Prestimulus delta and theta contributions to equiprobable Go/NoGo processing in healthy ageing

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
Frances M De Blasio, Robert J Barry

Abstract

Ongoing EEG activity contributes to ERP outcomes of stimulus processing, and each of these measures is known to undergo (sometimes significant) age-related change. Variation in their relationship across the life-span may thus elucidate mechanisms of normal and pathological ageing. This study assessed the relationships between low-frequency EEG prestimulus brain states, the ERP, and behavioural outcomes in a simple equiprobable auditory Go/NoGo paradigm, comparing these for 20 young (Mage = 20.4 years) and 20 healthy older (Mage = 68.2 years) adults. Prestimulus delta and theta amplitudes were separately assessed; these were each dominant across the midline region, and reduced in the older adults. For each band, (within-subjects) trials were sorted into ten increasing prestimulus EEG levels for which separate ERPs were derived. The set of ten ERPs for each band-sort was then quantified by PCA, independently for each group (young, older adults). Four components were primarily assessed (P1, N1-1, P2/N2b complex, and P3), with each showing age-related change. Mean RT was comparable, but intra-individual RT variability increased in older adults. Prestimulus delta and theta each generally modulated component positivity, indicating br...Continue Reading

Citations

Jan 8, 2019·Psychophysiology·Diana KaramacoskaGenevieve Z Steiner
Jun 2, 2020·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Frances M De Blasio, Robert J Barry
Feb 19, 2021·Journal of Neural Engineering·Francesca MiragliaPaolo Maria Rossini

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