Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2012:5:81-8.
doi: 10.2147/MDER.S36691. Epub 2012 Sep 26.

Investigating the role of combined acoustic-visual feedback in one-dimensional synchronous brain computer interfaces, a preliminary study

Gaetano D Gargiulo  1 , Armin Mohamed, Alistair L McEwan, Paolo Bifulco, Mario Cesarelli, Craig T Jin, Mariano Ruffo, Jonathan Tapson, André van Schaik
Affiliations

Investigating the role of combined acoustic-visual feedback in one-dimensional synchronous brain computer interfaces, a preliminary study

Gaetano D Gargiulo et al. Med Devices (Auckl). 2012.

Abstract

Feedback plays an important role when learning to use a brain computer interface (BCI), particularly in the case of synchronous feedback that relies on the interaction subject. In this preliminary study, we investigate the role of combined auditory-visual feedback during synchronous μ rhythm-based BCI sessions to help the subject to remain focused on the selected imaginary task. This new combined feedback, now integrated within the general purpose BCI2000 software, has been tested on eight untrained and three trained subjects during a monodimensional left-right control task. In order to reduce the setup burden and maximize subject comfort, an electroencephalographic device suitable for dry electrodes that required no skin preparation was used. Quality and index of improvement was evaluated based on a personal self-assessment questionnaire from each subject and quantitative data based on subject performance. Results for this preliminary study show that the combined feedback was well tolerated by the subjects and improved performance in 75% of the naïve subjects compared with visual feedback alone.

Keywords: brain computer interface; dry electrodes; subject feedback.

PubMed Disclaimer

Figures

Figure 1
Figure 1
Electroencephalographic example workspace as recorded from one subject showing clear lateralized μ rhythm pattern.
Figure 2
Figure 2
Lateralized μ rhythm in the frequency domain. C3 solid line, C4 dashed line in a (A) left imaginary task and in a (B) right imaginary task.
See this image and copyright information in PMC

References

    1. Schalk G, McFarland DJ, Hinterberger T, Birbaumer NR, Wolpaw J. BCI2000: a general-purpose brain-computer interface (BCI) system. IEEE Trans Biomed Eng. 2004;51:1034–1043. - PubMed
    1. Kauhanen L, Jylänki P, Lehtonen J, Rantanen P, Alaranta H, Sams M. EEG based brain computer interface for tetraplegics. Comput Intell Neurosci. 2007:23864. - PMC - PubMed
    1. Millan JR, Renkens F, Mourino J, Gerstner W. Non invasive brain-actuated control of a mobile robot by human EEG. IEEE Trans Biomed Eng. 2004;51:1026–1033. - PubMed
    1. Pfurtscheller G, Neuper C. Motor imagery and direct brain-computer communication. Proc IEEE Inst Electr Electron Eng. 2001;89:1123–1134.
    1. Pfurtscheller G, Brunner C, Schlogl A, Silva FH. Mu rhythm (de) synchronization and EEG single-trial classification of different motor imagery tasks. Neuroimage. 2006;31:153–159. - PubMed