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• W4387665836 abstract "Beta-band (13-35 Hz) modulations following reward, task outcome feedback and error have been described in cognitive and/or motor adaptation tasks. Observations from different studies are, however, difficult to conciliate. Among the studies that used cognitive response selection tasks, several reported an increase in beta-band activity following reward, whereas others observed increased beta-power after negative feedback. Moreover, in motor adaptation tasks, an attenuation of the post-movement beta-rebound follows movement-execution error induced by visual or mechanical perturbations. Given that kinematic error typically leads to negative task-outcome feedback (e.g. target missed), one may wonder how contradictory modulations - beta-power decrease with movement error vs beta-power increase with negative feedback - may coexist. We designed a motor adaptation task in which female and male participants experience varied feedbacks -binary success/failure feedback, kinematic error and sensory-prediction error - and demonstrate that beta-band modulations in opposite directions co-exist at different spatial locations, time-windows and frequency ranges. Firstly, high-beta power in the medial-frontal cortex showed opposite modulations well separated in time, when compared in success and failure trials, i.e. power was higher in success trials just after the binary success feedback whereas lower in post-movement period as compared to failure trials. Secondly, while medial-frontal high-beta activity was sensitive to task outcome, low-beta power in the medial-parietal cortex was strongly attenuated following movement-execution error but was not affected by either the outcome of the task or sensory-prediction error. These findings suggest that medial beta activity in different spatio-temporo-spectral configurations play a multifaceted role in encoding qualitatively distinct feedback signals.Significance StatementBeta-band activity reflects neural processes well beyond sensorimotor functions, including cognition and motivation. By disentangling alternative spatio-temporo-spectral patterns of possible beta-oscillatory activity, we reconcile seemingly discrepant literature. Firstly, high-beta power in the medial-frontal cortex showed opposite modulations separated in time in success and failure trials; power was higher in success trials just after success feedback and lower in post-movement period as compared to failure trials. Secondly, while medial-frontal high-beta activity was sensitive to task outcome, low-beta power in the medial-parietal cortex was strongly attenuated following movement-execution error but was not affected by the task outcome or the sensory prediction error. We propose that medial beta activity reflects distinct feedback signals depending on its anatomical location, time window and frequency range." @default.
• W4387665836 created "2023-10-17" @default.
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• W4387665836 date "2023-10-16" @default.
• W4387665836 modified "2023-10-18" @default.
• W4387665836 title "Different faces of medial beta-band activity reflect distinct visuomotor feedback signals" @default.
• W4387665836 doi "https://doi.org/10.1523/jneurosci.2238-22.2023" @default.
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