Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/93164
Título: | The dual nature of the BOLD signal: Responses in visual area hMT+ reflect both input properties and perceptual decision | Autor: | Sousa, Teresa Duarte, João V. Costa, Gabriel Nascimento Ferreira da Kemper, Valentin G. Martins, Ricardo Filipe Alves Goebel, Rainer Castelo-Branco, Miguel |
Data: | 12-Fev-2021 | Título da revista, periódico, livro ou evento: | Human Brain Mapping | Resumo: | Neuroimaging studies have suggested that hMT+ encodes global motion interpretation, but this contradicts the notion that BOLD activity mainly reflects neuronal input. While measuring fMRI responses at 7 Tesla, we used an ambiguous moving stimulus, yielding the perception of two incoherently moving surfaces-component motion-or only one coherently moving surface-pattern motion, to induce perceptual fluctuations and identify perceptual organization size-matched domains in hMT+. Then, moving gratings, exactly matching either the direction of component or pattern motion percepts of the ambiguous stimulus, were shown to the participants to investigate whether response properties reflect the input or decision. If hMT+ responses reflect the input, component motion domains (selective to incoherent percept) should show grating direction stimulus-dependent changes, unlike pattern motion domains (selective to the coherent percept). This hypothesis is based on the known direction-selective nature of inputs in component motion perceptual domains versus non-selectivity in pattern motion perceptual domains. The response amplitude of pattern motion domains did not change with grating direction (consistently with their non-selective input), in contrast to what happened for the component motion domains (consistently with their selective input). However, when we analyzed relative ratio measures they mirrored perceptual interpretation. These findings are consistent with the notion that patterns of BOLD responses reflect both sensory input and perceptual read-out. | URI: | https://hdl.handle.net/10316/93164 | ISSN: | 1065-9471 1097-0193 |
DOI: | 10.1002/hbm.25339 | Direitos: | openAccess |
Aparece nas coleções: | I&D CIBIT - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
full-text.pdf | full-text | 1.49 MB | Adobe PDF | Ver/Abrir |
Citações SCOPUSTM
3
Visto em 14/out/2024
Citações WEB OF SCIENCETM
3
Visto em 2/out/2024
Visualizações de página
301
Visto em 8/out/2024
Downloads
161
Visto em 8/out/2024
Google ScholarTM
Verificar
Altmetric
Altmetric
Este registo está protegido por Licença Creative Commons