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Beyond faces: the contribution of the amygdala to visual processing in the macaque brain.
Taubert, Jessica; Wardle, Susan G; Patterson, Amanda; Baker, Chris I.
Afiliação
  • Taubert J; Laboratory of Brain and Cognition, National Institute of Mental Health, 10 Center Dr, Bethesda, MD 20892 USA.
  • Wardle SG; School of Psychology, Level 3, McElwain Building (24A), The University of Queensland, Brisbane, QLD 4072, Australia.
  • Patterson A; Laboratory of Brain and Cognition, National Institute of Mental Health, 10 Center Dr, Bethesda, MD 20892 USA.
  • Baker CI; Laboratory of Brain and Cognition, National Institute of Mental Health, 10 Center Dr, Bethesda, MD 20892 USA.
Cereb Cortex ; 34(6)2024 Jun 04.
Article em En | MEDLINE | ID: mdl-38864574
ABSTRACT
The amygdala is present in a diverse range of vertebrate species, such as lizards, rodents, and primates; however, its structure and connectivity differs across species. The increased connections to visual sensory areas in primate species suggests that understanding the visual selectivity of the amygdala in detail is critical to revealing the principles underlying its function in primate cognition. Therefore, we designed a high-resolution, contrast-agent enhanced, event-related fMRI experiment, and scanned 3 adult rhesus macaques, while they viewed 96 naturalistic stimuli. Half of these stimuli were social (defined by the presence of a conspecific), the other half were nonsocial. We also nested manipulations of emotional valence (positive, neutral, and negative) and visual category (faces, nonfaces, animate, and inanimate) within the stimulus set. The results reveal widespread effects of emotional valence, with the amygdala responding more on average to inanimate objects and animals than faces, bodies, or social agents in this experimental context. These findings suggest that the amygdala makes a contribution to primate vision that goes beyond an auxiliary role in face or social perception. Furthermore, the results highlight the importance of stimulus selection and experimental design when probing the function of the amygdala and other visually responsive brain regions.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Estimulação Luminosa / Imageamento por Ressonância Magnética / Tonsila do Cerebelo / Macaca mulatta Limite: Animals Idioma: En Revista: Cereb Cortex Assunto da revista: CEREBRO Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Estimulação Luminosa / Imageamento por Ressonância Magnética / Tonsila do Cerebelo / Macaca mulatta Limite: Animals Idioma: En Revista: Cereb Cortex Assunto da revista: CEREBRO Ano de publicação: 2024 Tipo de documento: Article