On the quantification of SSVEP frequency responses in human EEG for application to BCI.

Rafał Kuś , Anna Duszyk , Piotr Milanowski , Maciej Labecki , Maria Bierzyńska , Zofia Radzikowska , Magdalena Michalska , Jaroslaw Zygierewicz , Piotr Suffczyński , Piotr Durka

Abstract

This article concerns one of the most important problems of brain-computer interfaces (BCI) based on Steady State Visual Evoked Potentials (SSVEP), that is the selection of the a-priori most suitable frequencies for stimulation. Previous works related to this problem were done either with measuring systems that have little in common with actual BCI systems (e.g., single flashing LED) or were presented on a small number of subjects, or the tested frequency range did not cover a broad spectrum. Their results indicate a strong SSVEP response around 10 Hz, in the range 13–25 Hz, and at high frequencies in the band of 40–60 Hz. In the case of BCI interfaces, stimulation with frequencies from various ranges are used. The frequencies are often adapted for each user separately. The selection of these frequencies, however, was not yet justified in quantitative group-level study with proper statistical account for inter-subject variability. The aim of this study is to determine the SSVEP response curve, that is, the magnitude of the evoked signal as a function of frequency. The SSVEP response was induced in conditions as close as possible to the actual BCI system, using a wide range of frequencies (5–30 Hz, in step of 1 Hz). The data were obtained for 10 subjects. SSVEP curves for individual subjects and the population curve was determined. Statistical analysis were conducted both on the level of individual subjects and for the group. The main result of the study is the identification of the optimal range of frequencies, which is 12–18 Hz, for the registration of SSVEP phenomena. The applied criterion of optimality was: to find the largest contiguous range of frequencies yielding the strong and constant-level SSVEP response.
Author Rafał Kuś
Rafał Kuś ,,
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, Anna Duszyk (Wydział Psychologii)
Anna Duszyk,,
- Wydział Psychologii
, Piotr Milanowski
Piotr Milanowski,,
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, Maciej Labecki
Maciej Labecki,,
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, Maria Bierzyńska
Maria Bierzyńska,,
-
, Zofia Radzikowska
Zofia Radzikowska,,
-
, Magdalena Michalska
Magdalena Michalska,,
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, Jaroslaw Zygierewicz
Jaroslaw Zygierewicz,,
-
, Piotr Suffczyński
Piotr Suffczyński,,
-
, Piotr Durka
Piotr Durka,,
-
Journal seriesPlos One, ISSN 1932-6203, (A 35 pkt)
Issue year2013
Vol8
No10
Pages1-9
Publication size in sheets0.5
ASJC Classification1100 General Agricultural and Biological Sciences; 1300 General Biochemistry, Genetics and Molecular Biology; 2700 General Medicine
DOIDOI:10.1371/journal.pone.0112099
URL http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0077536
Languageen angielski
File
AD.pdf of 14-09-2015
1.15 MB
Score (nominal)40
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.153; WoS Impact Factor: 2013 = 3.534 (2) - 2013=4.015 (5)
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Dorobek Naukowy - Preview URLhttp://dn.swps.edu.pl/Podglad.aspx?WpisID=14251
Dorobek Naukowy - Approve URLhttp://dn.swps.edu.pl/Biuro/ZatwierdzanieWpisu.aspx?WpisID=14251
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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