Prestimulus alpha power is related to the strength of stimulus representation

Author(s)

Barne, Louise C. ^[1] ; de Lange, Floris P. ^[2] ; Cravo, Andre M. ^[1]

Affiliation

^[1] Univ Fed ABC UFABC, Ctr Matemat Comp & Cognicao, Sao Bernardo Do Campo, SP - Brazil

^[2] Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, Nijmegen - Netherlands

• Document type: Journal article
• Source: CORTEX; v. 132, p. 250-257, NOV 2020.
• Web of Science Citations: 0

Abstract

Spatial attention can modulate behavioural performance and is associated with several electrophysiological markers. In this study, we used multivariate pattern analysis in electrophysiology data to investigate the effects of covert spatial attention on the quality of stimulus processing and its underlying mechanisms. Our results show that covert spatial attention led to (i) an anticipatory alpha power desynchronization; (ii) enhanced stimuli identity information. Moreover, we found that alpha power fluctuations in anticipation of the relevant stimuli boosted and prolonged the coding of stimulus identity. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 18/08844-7 - Neural mechanisms of temporal anticipation in vision and audition
• Grantee: Louise Catheryne Barne
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 17/25161-8 - The representation of temporal information in neural activity
• Grantee: André Mascioli Cravo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/04258-0 - Attention and expectation effects on neural processing
• Grantee: Louise Catheryne Barne
• Support Opportunities: Scholarships in Brazil - Doctorate