A dynamic selection method for reference electrode in SSVEP-based BCI.

In SSVEP-based Brain-Computer Interface (BCI), it is very important to get an evoked EEG with a high signal to noise ratio (SNR). The SNR of SSVEP is fundamentally related to the characteristics of stimulus, such as its intensity and frequency, and it is also related to both the reference electrode...

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Autores principales:	Zhenghua Wu, Sheng Su
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d87c0f6316be4408b6966007cd0ae059
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id	oai:doaj.org-article:d87c0f6316be4408b6966007cd0ae059
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spelling	oai:doaj.org-article:d87c0f6316be4408b6966007cd0ae0592021-11-25T06:05:45ZA dynamic selection method for reference electrode in SSVEP-based BCI.1932-620310.1371/journal.pone.0104248https://doaj.org/article/d87c0f6316be4408b6966007cd0ae0592014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25100038/?tool=EBIhttps://doaj.org/toc/1932-6203In SSVEP-based Brain-Computer Interface (BCI), it is very important to get an evoked EEG with a high signal to noise ratio (SNR). The SNR of SSVEP is fundamentally related to the characteristics of stimulus, such as its intensity and frequency, and it is also related to both the reference electrode and the active electrode. In the past, with SSVEP-based BCI, often the potential at 'Cz', the average potential at all electrodes or the average mastoid potential, were statically selected as the reference. In conjunction, a certain electrode in the occipital area was statically selected as the active electrode for all stimuli. This work proposed a dynamic selection method for the reference electrode, in which all electrodes can be looked upon as active electrodes, while an electrode which can result in the maximum sum relative-power of a specific frequency SSVEP can be confirmed dynamically and considered as the optimum reference electrode for that specific frequency stimulus. Comparing this dynamic selection method with previous methods, in which 'Cz', the average potential at all electrodes or the average mastoid potential were selected as the reference electrode, it is demonstrated that the SNR of SSVEP is improved significantly as is the accuracy of SSVEP detection.Zhenghua WuSheng SuPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 8, p e104248 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhenghua Wu Sheng Su A dynamic selection method for reference electrode in SSVEP-based BCI.
description	In SSVEP-based Brain-Computer Interface (BCI), it is very important to get an evoked EEG with a high signal to noise ratio (SNR). The SNR of SSVEP is fundamentally related to the characteristics of stimulus, such as its intensity and frequency, and it is also related to both the reference electrode and the active electrode. In the past, with SSVEP-based BCI, often the potential at 'Cz', the average potential at all electrodes or the average mastoid potential, were statically selected as the reference. In conjunction, a certain electrode in the occipital area was statically selected as the active electrode for all stimuli. This work proposed a dynamic selection method for the reference electrode, in which all electrodes can be looked upon as active electrodes, while an electrode which can result in the maximum sum relative-power of a specific frequency SSVEP can be confirmed dynamically and considered as the optimum reference electrode for that specific frequency stimulus. Comparing this dynamic selection method with previous methods, in which 'Cz', the average potential at all electrodes or the average mastoid potential were selected as the reference electrode, it is demonstrated that the SNR of SSVEP is improved significantly as is the accuracy of SSVEP detection.
format	article
author	Zhenghua Wu Sheng Su
author_facet	Zhenghua Wu Sheng Su
author_sort	Zhenghua Wu
title	A dynamic selection method for reference electrode in SSVEP-based BCI.
title_short	A dynamic selection method for reference electrode in SSVEP-based BCI.
title_full	A dynamic selection method for reference electrode in SSVEP-based BCI.
title_fullStr	A dynamic selection method for reference electrode in SSVEP-based BCI.
title_full_unstemmed	A dynamic selection method for reference electrode in SSVEP-based BCI.
title_sort	dynamic selection method for reference electrode in ssvep-based bci.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/d87c0f6316be4408b6966007cd0ae059
work_keys_str_mv	AT zhenghuawu adynamicselectionmethodforreferenceelectrodeinssvepbasedbci AT shengsu adynamicselectionmethodforreferenceelectrodeinssvepbasedbci AT zhenghuawu dynamicselectionmethodforreferenceelectrodeinssvepbasedbci AT shengsu dynamicselectionmethodforreferenceelectrodeinssvepbasedbci
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A dynamic selection method for reference electrode in SSVEP-based BCI.

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