Adequate Spatial Sampling - continued.Achieving a one to two cm sampling density would require 500 EEG channels distributed evenly over the surface of the head. With 256-channel sampling, dEEG now approximates adequate spatial sampling. With EGI's medical grade EEG systems, this accuracy is available to clinicians wherever brain monitoring is required.
Malmivuo, J. & Plonsey, R. (1995). Bioelectromagnetism. New York: Oxford University Press.Ryynanen, O. R., Hyttinen, J. A., Laarne, P. H., & Malmivuo, J. A. (2004). Effect of electrode density and measurement noise on the spatial resolution of cortical potential distribution. IEEE Trans Biomed Eng, 51(9), 1547-1554.Ryynanen, O. R., Hyttinen, J. A., & Malmivuo, J. A. (2006). Effect of measurement noise and electrode density on the spatial resolution of cortical potential distribution with different resistivity values for the skull. IEEE Trans Biomed Eng, 53(9), 1851-1858.Srinivasan, R., Tucker, D. M., & Murias, M. (1998). Estimating the spatial Nyquist of the human EEG. Behavioral Research Methods, Instruments, & Computers, 30, 8-19. |