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Decoding the difference between explicit and implicit body expression representation in high level visual, prefrontal and inferior parietal cortex
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Decoding the difference between explicit and implicit body expression representation in high level visual, prefrontal and inferior parietal cortex
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Journal Article
Decoding the difference between explicit and implicit body expression representation in high level visual, prefrontal and inferior parietal cortex
2021
Overview
Recent studies provide an increasing understanding of how visual objects categories like faces or bodies are represented in the brain and also raised the question whether a category based or more dynamic network inspired models are more powerful. Two important and so far sidestepped issues in this debate are, first, how major category attributes like the emotional expression directly influence category representation and second, whether category and attribute representation are sensitive to task demands. This study investigated the impact of a crucial category attribute like emotional expression on category area activity and whether this varies with the participants’ task. Using (fMRI) we measured BOLD responses while participants viewed whole body expressions and performed either an explicit (emotion) or an implicit (shape) recognition task. Our results based on multivariate methods show that the type of task is the strongest determinant of brain activity and can be decoded in EBA, VLPFC and IPL. Brain activity was higher for the explicit task condition in VLPFC and was not emotion specific. This pattern suggests that during explicit recognition of the body expression, body category representation may be strengthened, and emotion and action related activity suppressed. Taken together these results stress the importance of the task and of the role of category attributes for understanding the functional organization of high level visual cortex.
Publisher
Elsevier Inc,Elsevier Limited,Elsevier
