Bin Lou et al 2008 J. Neural Eng. 5 342 doi:10.1088/1741-2560/5/3/007
Bin Lou, Bo Hong, Xiaorong Gao and Shangkai Gao
Show affiliationsA motor imagery based brain–computer interface (BCI) provides a non-muscular communication channel that enables people with paralysis to control external devices using their motor imagination. Reducing the number of electrodes is critical to improving the portability and practicability of the BCI system. A novel method is proposed to reduce the number of electrodes to a total of four by finding the optimal positions of two bipolar electrodes. Independent component analysis (ICA) is applied to find the source components of mu and alpha rhythms, and optimal electrodes are chosen by comparing the projection weights of sources on each channel. The results of eight subjects demonstrate the better classification performance of the optimal layout compared with traditional layouts, and the stability of this optimal layout over a one week interval was further verified.
87.85.Ng Biological signal processing
87.19.R- Mechanical and electrical properties of tissues and organs
Issue 3 (15 September 2008)
Received 2 June 2008, accepted for publication 7 August 2008
Published 28 August 2008
Bin Lou et al 2008 J. Neural Eng. 5 342
D E Newbury 1990 Nanotechnology 1 103
Sylvain Fasel et al 2006 New J. Phys. 8 13
Andrew Campbell and Geoff Coulson 1997 Distrib. Syst. Engng. 4 48
D E Vincent 1985 Class. Quantum Grav. 2 409
J G Morley et al 1976 J. Phys. D: Appl. Phys. 9 1031
Annemie Bogaerts 1999 Plasma Sources Sci. Technol. 8 210
Allan Adams and Jarah Evslin JHEP02(2003)029
Masahito Hayashi 2007 New J. Phys. 9 284
Patrick J Windpassinger et al 2008 New J. Phys. 10 053032