Different temporal dynamics of foveal and peripheral visual processing during fixation.
Proc Natl Acad Sci U S A
; 121(37): e2408067121, 2024 Sep 10.
Article
em En
| MEDLINE
| ID: mdl-39226351
ABSTRACT
Humans explore visual scenes by alternating short fixations with saccades directing the fovea to points of interest. During fixation, the visual system not only examines the foveal stimulus at high resolution, but it also processes the extrafoveal input to plan the next saccade. Although foveal analysis and peripheral selection occur in parallel, little is known about the temporal dynamics of foveal and peripheral processing upon saccade landing, during fixation. Here we investigate whether the ability to localize changes across the visual field differs depending on when the change occurs during fixation, and on whether the change localization involves foveal, extrafoveal processing, or both. Our findings reveal that the ability to localize changes in peripheral areas of the visual field improves as a function of time after fixation onset, whereas localization accuracy for foveal stimuli remains approximately constant. Importantly, this pattern holds regardless of whether individuals monitor only foveal or peripheral stimuli, or both simultaneously. Altogether, these results show that the visual system is more attuned to the foveal input early on during fixation, whereas change localization for peripheral stimuli progressively improves throughout fixation, possibly as a consequence of an increased readiness to plan the next saccade.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Movimentos Sacádicos
/
Campos Visuais
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Fixação Ocular
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Fóvea Central
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Proc Natl Acad Sci U S A
/
Proc. Natl. Acad. Sci. U. S. A
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Proceedings of the national academy of sciences of the United States of America
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Espanha
País de publicação:
Estados Unidos