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Cortical brain regions associated with color processing: an FMRI study
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Orientador(es)
Resumo(s)
To clarify whether the neural pathways concerning color processing are the same for natural objects, for
artifacts objects and for non-objects we examined brain responses measured with functional magnetic resonance imaging
(FMRI) during a covert naming task including the factors color (color
vs.
black&white (B&W)) and stimulus type (natural
vs.
artifacts
vs.
non-objects). Our results indicate that the superior parietal lobule and precuneus (BA 7) bilaterally, the
right hippocampus and the right fusifom gyrus (V4) make part of a network responsible for color processing both for
natural objects and artifacts, but not for non-objects. When color objects (both natural and artifacts) were contrasted with
color non-objects we observed activations in the right parahippocampal gyrus (BA 35/36), the superior parietal lobule
(BA 7) bilaterally, the left inferior middle temporal region (BA 20/21) and the inferior and superior frontal regions (BA
10/11/47). These additional activations s
uggest that colored objects recruit brain regions that are related to visual semantic
information/retrieval and brain regions related to visuo-spatial processing. Overall, the results suggest that color
information is an attribute that can improve object recognition (behavioral results) and activate a specific neural network
related to visual semantic information that is more extensive than for B&W objects during object recognition
Descrição
Palavras-chave
FMRI Color information and processing Naming Natural objects Artifacts objects Non-objects
Contexto Educativo
Citação
Bramão, Inês; Faísca, Luís; Forkstam, Christian; Reis, Alexandra; Petersson, Karl Magnus. Cortical brain regions associated with color processing: an FMRI study, The open neuroimaging journal, 4, 1, 164-173, 2010.