Spatiotemporal dynamics of attention networks revealed by representational similarity analysis of EEG and fMRI

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Sammanfattning

The fronto-parietal attention networks have been extensively studied with functional magnetic resonance imaging (fMRI), but spatiotemporal dynamics of these networks are not well understood. We measured event-related potentials (ERPs) with electroencephalography (EEG) and collected fMRI data from identical experiments where participants performed visual and auditory discrimination tasks separately or simultaneously and with or without distractors. To overcome the low temporal resolution of fMRI, we used a novel ERP-based application of multivariate representational similarity analysis (RSA) to parse time-averaged fMRI pattern activity into distinct spatial maps that each corresponded, in representational structure, to a short temporal ERP segment. Discriminant analysis of ERP-fMRI correlations revealed 8 cortical networks-2 sensory, 3 attention, and 3 other-segregated by 4 orthogonal, temporally multifaceted and spatially distributed functions. We interpret these functions as 4 spatiotemporal components of attention: modality-dependent and stimulus-driven orienting, top-down control, mode transition, and response preparation, selection and execution.
Originalspråkengelska
TidskriftCerebral Cortex
Volym28
Utgåva2
Sidor (från-till)549–560
Antal sidor12
ISSN1047-3211
DOI
StatusPublicerad - feb 2018
MoE-publikationstypA1 Tidskriftsartikel-refererad

Vetenskapsgrenar

  • 515 Psykologi

Projekt

Ylikuormitetut aivot

Alho, K.

01/09/201231/08/2016

Projekt: Forskningsprojekt

Citera det här