Portable wireless neurofeedback system of EEG alpha rhythm enhances memory

BACKGROUND: Effect of neurofeedback training (NFT) on enhancement of cognitive function or amelioration of clinical symptoms is inconclusive. The trainability of brain rhythm using a neurofeedback system is uncertainty because various experimental designs are used in previous studies. The current st...

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Autores principales: Wei, Ting-Ying, Chang, Da-Wei, Liu, You-De, Liu, Chen-Wei, Young, Chung-Ping, Liang, Sheng-Fu, Shaw, Fu-Zen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5684759/
https://www.ncbi.nlm.nih.gov/pubmed/29132359
http://dx.doi.org/10.1186/s12938-017-0418-8
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author Wei, Ting-Ying
Chang, Da-Wei
Liu, You-De
Liu, Chen-Wei
Young, Chung-Ping
Liang, Sheng-Fu
Shaw, Fu-Zen
author_facet Wei, Ting-Ying
Chang, Da-Wei
Liu, You-De
Liu, Chen-Wei
Young, Chung-Ping
Liang, Sheng-Fu
Shaw, Fu-Zen
author_sort Wei, Ting-Ying
collection PubMed
description BACKGROUND: Effect of neurofeedback training (NFT) on enhancement of cognitive function or amelioration of clinical symptoms is inconclusive. The trainability of brain rhythm using a neurofeedback system is uncertainty because various experimental designs are used in previous studies. The current study aimed to develop a portable wireless NFT system for alpha rhythm and to validate effect of the NFT system on memory with a sham-controlled group. METHODS: The proposed system contained an EEG signal analysis device and a smartphone with wireless Bluetooth low-energy technology. Instantaneous 1-s EEG power and contiguous 5-min EEG power throughout the training were developed as feedback information. The training performance and its progression were kept to boost usability of our device. Participants were blinded and randomly assigned into either the control group receiving random 4-Hz power or Alpha group receiving 8–12-Hz power. Working memory and episodic memory were assessed by the backward digital span task and word-pair task, respectively. RESULTS: The portable neurofeedback system had advantages of a tiny size and long-term recording and demonstrated trainability of alpha rhythm in terms of significant increase of power and duration of 8–12 Hz. Moreover, accuracies of the backward digital span task and word-pair task showed significant enhancement in the Alpha group after training compared to the control group. CONCLUSIONS: Our tiny portable device demonstrated success trainability of alpha rhythm and enhanced two kinds of memories. The present study suggest that the portable neurofeedback system provides an alternative intervention for memory enhancement.
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spelling pubmed-56847592017-11-20 Portable wireless neurofeedback system of EEG alpha rhythm enhances memory Wei, Ting-Ying Chang, Da-Wei Liu, You-De Liu, Chen-Wei Young, Chung-Ping Liang, Sheng-Fu Shaw, Fu-Zen Biomed Eng Online Research BACKGROUND: Effect of neurofeedback training (NFT) on enhancement of cognitive function or amelioration of clinical symptoms is inconclusive. The trainability of brain rhythm using a neurofeedback system is uncertainty because various experimental designs are used in previous studies. The current study aimed to develop a portable wireless NFT system for alpha rhythm and to validate effect of the NFT system on memory with a sham-controlled group. METHODS: The proposed system contained an EEG signal analysis device and a smartphone with wireless Bluetooth low-energy technology. Instantaneous 1-s EEG power and contiguous 5-min EEG power throughout the training were developed as feedback information. The training performance and its progression were kept to boost usability of our device. Participants were blinded and randomly assigned into either the control group receiving random 4-Hz power or Alpha group receiving 8–12-Hz power. Working memory and episodic memory were assessed by the backward digital span task and word-pair task, respectively. RESULTS: The portable neurofeedback system had advantages of a tiny size and long-term recording and demonstrated trainability of alpha rhythm in terms of significant increase of power and duration of 8–12 Hz. Moreover, accuracies of the backward digital span task and word-pair task showed significant enhancement in the Alpha group after training compared to the control group. CONCLUSIONS: Our tiny portable device demonstrated success trainability of alpha rhythm and enhanced two kinds of memories. The present study suggest that the portable neurofeedback system provides an alternative intervention for memory enhancement. BioMed Central 2017-11-13 /pmc/articles/PMC5684759/ /pubmed/29132359 http://dx.doi.org/10.1186/s12938-017-0418-8 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Wei, Ting-Ying
Chang, Da-Wei
Liu, You-De
Liu, Chen-Wei
Young, Chung-Ping
Liang, Sheng-Fu
Shaw, Fu-Zen
Portable wireless neurofeedback system of EEG alpha rhythm enhances memory
title Portable wireless neurofeedback system of EEG alpha rhythm enhances memory
title_full Portable wireless neurofeedback system of EEG alpha rhythm enhances memory
title_fullStr Portable wireless neurofeedback system of EEG alpha rhythm enhances memory
title_full_unstemmed Portable wireless neurofeedback system of EEG alpha rhythm enhances memory
title_short Portable wireless neurofeedback system of EEG alpha rhythm enhances memory
title_sort portable wireless neurofeedback system of eeg alpha rhythm enhances memory
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5684759/
https://www.ncbi.nlm.nih.gov/pubmed/29132359
http://dx.doi.org/10.1186/s12938-017-0418-8
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