Does cross-frequency phase coupling of oscillatory brain activity contribute to a better understanding of visual working memory?
Br J Psychol
; 110(2): 245-255, 2019 May.
Article
em En
| MEDLINE
| ID: mdl-30079531
ABSTRACT
Nesting of fast rhythmical brain activity (gamma) into slower brain waves (theta) has frequently been suggested as a core mechanism of multi-item working memory (WM) retention. It provides a better understanding of WM capacity limitations, and, as we discuss in this review article, it can lead to applications for modulating memory capacity. However, could cross-frequency coupling of brain oscillations also constructively contribute to a better understanding of the neuronal signatures of working memory compatible with theoretical approaches that assume flexible capacity limits? Could a theta-gamma code also be considered as a neural mechanism of flexible sharing of cognitive resources between memory representations in multi-item WM? Here, we propose potential variants of theta-gamma coupling that could explain WM retention beyond a fixed memory capacity limit of a few visual items. Moreover, we suggest how to empirically test these predictions in the future.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ritmo Teta
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Córtex Cerebral
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Sincronização de Fases em Eletroencefalografia
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Ritmo Gama
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Memória de Curto Prazo
Limite:
Humans
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article