Top-down versus bottom-up attention differentially modulate frontal-parietal connectivity.
Hum Brain Mapp
; 41(4): 928-942, 2020 03.
Article
em En
| MEDLINE
| ID: mdl-31692192
ABSTRACT
The moment-to-moment focus of our mind's eye results from a complex interplay of voluntary and involuntary influences on attention. Previous neuroimaging studies suggest that the brain networks of voluntary versus involuntary attention can be segregated into a frontal-versus-parietal or a dorsal-versus-ventral partition-although recent work suggests that the dorsal network may be involved in both bottom-up and top-down attention. Research with nonhuman primates has provided evidence that a key distinction between top-down and bottom-up attention may be the direction of connectivity between frontal and parietal areas. Whereas typical fMRI connectivity analyses cannot disambiguate the direction of connections, dynamic causal modeling (DCM) can model directionality. Using DCM, we provide new evidence that directed connections within the dorsal attention network are differentially modulated for voluntary versus involuntary attention. These results suggest that the intraparietal sulcus exerts a baseline inhibitory effect on the frontal eye fields that is strengthened during exogenous orienting and attenuated during endogenous orienting. Furthermore, the attenuation from endogenous attention occurs even with salient peripheral cues when those cues are known to be counter predictive. Thus, directed connectivity between frontal and parietal regions of the dorsal attention network is highly influenced by the type of attention that is engaged.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Lobo Parietal
/
Desempenho Psicomotor
/
Atenção
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Percepção Visual
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Conectoma
/
Lobo Frontal
/
Modelos Teóricos
/
Rede Nervosa
Tipo de estudo:
Prognostic_studies
Limite:
Adult
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Female
/
Humans
/
Male
Idioma:
En
Revista:
Hum Brain Mapp
Ano de publicação:
2020
Tipo de documento:
Article