Auditory hemispheric asymmetry for actions and objects.
Cereb Cortex
; 34(7)2024 Jul 03.
Article
em En
| MEDLINE
| ID: mdl-39051660
ABSTRACT
What is the function of auditory hemispheric asymmetry? We propose that the identification of sound sources relies on the asymmetric processing of two complementary and perceptually relevant acoustic invariants actions and objects. In a large dataset of environmental sounds, we observed that temporal and spectral modulations display only weak covariation. We then synthesized auditory stimuli by simulating various actions (frictions) occurring on different objects (solid surfaces). Behaviorally, discrimination of actions relies on temporal modulations, while discrimination of objects relies on spectral modulations. Functional magnetic resonance imaging data showed that actions and objects are decoded in the left and right hemispheres, respectively, in bilateral superior temporal and left inferior frontal regions. This asymmetry reflects a generic differential processing-through differential neural sensitivity to temporal and spectral modulations present in environmental sounds-that supports the efficient categorization of actions and objects. These results support an ecologically valid framework of the functional role of auditory brain asymmetry.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Percepção Auditiva
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Estimulação Acústica
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Imageamento por Ressonância Magnética
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Lateralidade Funcional
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Cereb Cortex
Ano de publicação:
2024
Tipo de documento:
Article