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Better than sleep: Theta neurofeedback training accelerates memory consolidation
Author links open overlay panelMiriamReineraRomanRozengurtbAnatBarneac
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https://doi.org/10.1016/j.biopsycho.2013.10.010Get rights and content

Highlights

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Theta neurofeedback training improves memory consolidation of a motor sequence.
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Memory consolidation was maintained after theta neurofeedback training for 7 days, longer than any of the control groups.
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Night sleep further improved motor performance of the Theta neurofeedback training group, beyond improvement in the control groups.
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Level of increase in neurofeedback power of the theta correlates with the level of improvement in performance.


Abstract
Consistent empirical results showed that both night and day sleep enhanced memory consolidation. In this study we explore processes of consolidation of memory during awake hours. Since theta oscillations have been shown to play a central role in exchange of information, we hypothesized that elevated theta during awake hours will enhance memory consolidation.
We used a neurofeedback protocol, to enhance the relative power of theta or beta oscillations. Participants trained on a tapping task, were divided into three groups: neurofeedback theta; neurofeedback beta; control. We found a significant improvement in performance in the theta group, relative to the beta and control groups, immediately after neurofeedback. Performance was further improved after night sleep in all groups, with a significant advantage favoring the theta group. Theta power during training was correlated with the level of improvement, indicating a clear relationship between memory consolidation, and theta neurofeedback.

https://www.sciencedirect.com/science/ar...1113002214

Near-infrared spectroscopy based neurofeedback training increases specific motor imagery related cortical activation compared to sham feedback
Author links open overlay panelS.E.KoberaG.WoodaJ.KurzmannaE.V.C.FriedrichabM.StanglaT.WippelaA.VäljamäeaC.Neuperab
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https://doi.org/10.1016/j.biopsycho.2013.05.005Get rights and content

Highlights

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Implementation of a real-time feedback system based on multichannel NIRS.
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NIRS based neurofeedback training increases specific cortical activation.
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Long-term effect of NIRS-based NF on motor imagery-related cortical activation.
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Amount of benefit achieved with NF is proportional to mental imagery abilities.


Abstract
In the present study we implemented a real-time feedback system based on multichannel near-infrared spectroscopy (NIRS). Prior studies indicated that NIRS-based neurofeedback can enhance motor imagery related cortical activation. To specify these prior results and to confirm the efficacy of NIRS-based neurofeedback, we examined changes in blood oxygenation level collected in eight training sessions. One group got real feedback about their own brain activity (N = 9) and one group saw a playback of another person’s feedback recording (N = 8). All participants performed motor imagery of a right hand movement. Real neurofeedback induced specific and focused brain activation over left motor areas. This focal brain activation became even more specific over the eight training sessions. In contrast, sham feedback led to diffuse brain activation patterns over the whole cortex. These findings can be useful when training patients with focal brain lesions to increase activity of specific brain areas for rehabilitation purpose.

https://www.sciencedirect.com/science/ar...1113001233

Comparing tomographic EEG neurofeedback and EMG biofeedback in children with attention-deficit/hyperactivity disorder
Author links open overlay panelStefanoMaurizioab1Martina DanielaLiechtiabcd1HartmutHeinrichefLutzJänckebcHans-ChristophSteinhausenaghSusanneWalitzaaDanielBrandeisabij2RenateDrechslera2
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https://doi.org/10.1016/j.biopsycho.2013.10.008Get rights and content

Highlights

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Tomographic neurofeedback training (NF) of ACC activity is compared to EMG-biofeedback.
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Blinded ratings of ADHD symptoms indicate improvements after both treatments.
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Larger improvements on visuo-motor and coordination tasks after EMG-biofeedback.
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Learning regulation across sessions is found for EMG-biofeedback but not for NF.
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Only NF shows a trend toward normalization of the trained frequency bands.


Abstract
Two types of biofeedback (BF), tomographic electroencephalogram (EEG) neurofeedback (NF) and electromyographic biofeedback (EMG-BF), both with phasic and tonic protocols, were compared for treatment effects and specificity in attention-deficit/hyperactivity disorder (ADHD). Thirteen children with ADHD trained their brain activity in the anterior cingulate cortex (ACC), and twelve trained activity of arm muscles involved in fine motor skills. In each training session, resting state 24-channel EEG and training performances were recorded. Both groups showed similar behavioral improvements and artifact reduction in selected conditions, with no significant advantages despite medium effect sizes on primary outcomes for NF. Only the EMG-BF group, however, showed clear improvement in training regulation performance, and specific motor coordination effects. The NF group tended to present individual normalization of trained frequency bands in the ACC during rest across training. The results provide evidence for some specific effects in our small sample, albeit only to a small extent.

https://www.sciencedirect.com/science/ar...1113002196