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Learning to optimize perceptual decisions through suppressive interactions in the human brain
- Source :
- Nature Communications, Vol 10, Iss 1, Pp 1-12 (2019)
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- Translating noisy sensory signals to perceptual decisions is critical for successful interactions in complex environments. Learning is known to improve perceptual judgments by filtering external noise and task-irrelevant information. Yet, little is known about the brain mechanisms that mediate learning-dependent suppression. Here, we employ ultra-high field magnetic resonance spectroscopy of GABA to test whether suppressive processing in decision-related and visual areas facilitates perceptual judgments during training. We demonstrate that parietal GABA relates to suppression of task-irrelevant information, while learning-dependent changes in visual GABA relate to enhanced performance in target detection and feature discrimination tasks. Combining GABA measurements with functional brain connectivity demonstrates that training on a target detection task involves local connectivity and disinhibition of visual cortex, while training on a feature discrimination task involves inter-cortical interactions that relate to suppressive visual processing. Our findings provide evidence that learning optimizes perceptual decisions through suppressive interactions in decision-related networks.
Details
- Database :
- OpenAIRE
- Journal :
- Nature Communications, Vol 10, Iss 1, Pp 1-12 (2019)
- Accession number :
- edsair.doi.dedup.....5f09bbfa1ea61d9fe8c602b02153ec2f
- Full Text :
- https://doi.org/10.17863/cam.35795