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Type: Journal article
Title: Proprioceptive feedback facilitates motor imagery-related operant learning of sensorimotor β-band modulation
Other Titles: Proprioceptive feedback facilitates motor imagery-related operant learning of sensorimotor beta-band modulation
Author: Darvishi, S.
Gharabaghi, A.
Boulay, C.
Ridding, M.
Abbott, D.
Baumert, M.
Citation: Frontiers in Neuroscience, 2017; 11(FEB):60-1-60-13
Publisher: Frontiers Media
Issue Date: 2017
ISSN: 1662-4548
Statement of
Sam Darvishi, Alireza Gharabaghi, Chadwick B. Boulay, Michael C. Ridding, Derek Abbott and Mathias Baumert
Abstract: Motor imagery (MI) activates the sensorimotor system independent of actual movements and might be facilitated by neurofeedback. Knowledge on the interaction between feedback modality and the involved frequency bands during MI-related brain self-regulation is still scarce. Previous studies compared the cortical activity during the MI task with concurrent feedback (MI with feedback condition) to cortical activity during the relaxation task where no feedback was provided (relaxation without feedback condition). The observed differences might, therefore, be related to either the task or the feedback. A proper comparison would necessitate studying a relaxation condition with feedback and a MI task condition without feedback as well. Right-handed healthy subjects performed two tasks, i.e., MI and relaxation, in alternating order. Each of the tasks (MI vs. relaxation) was studied with and without feedback. The respective event-driven oscillatory activity, i.e., sensorimotor desynchronization (during MI) or synchronization (during relaxation), was rewarded with contingent feedback. Importantly, feedback onset was delayed to study the task-related cortical activity in the absence of feedback provision during the delay period. The reward modality was alternated every 15 trials between proprioceptive and visual feedback. Proprioceptive input was superior to visual input to increase the range of task-related spectral perturbations in the α- and β-band, and was necessary to consistently achieve MI-related sensorimotor desynchronization (ERD) significantly below baseline. These effects occurred in task periods without feedback as well. The increased accuracy and duration of learned brain self-regulation achieved in the proprioceptive condition was specific to the β-band. MI-related operant learning of brain self-regulation is facilitated by proprioceptive feedback and mediated in the sensorimotor β-band.
Keywords: beta rhythms; brain-computer interface; brain-machine interface; brain-robot interface; neurorehabilitation; operant conditioning; reinforcement learning; stroke
Rights: Copyright © 2017 Darvishi, Gharabaghi, Boulay, Ridding, Abbott and Baumert. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
RMID: 0030065051
DOI: 10.3389/fnins.2017.00060
Appears in Collections:Medicine publications

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