FT_LATERALIZEDPOTENTIAL
Note that this reference documentation is identical to the help that is displayed in MATLAB when you type “help ft_lateralizedpotential”.
FT_LATERALIZEDPOTENTIAL computes lateralized potentials such as the lateralized readiness potential (LRP) Use as [lrp] = ft_lateralizedpotential(cfg, avgL, avgR) where the input datasets should come from FT_TIMELOCKANALYSIS and the configuration should contain cfg.channelcmb = Nx2 cell array An example channelcombination containing the homologous channels in the 10-20 standard system is cfg.channelcmb = {'Fp1' 'Fp2' 'F7' 'F8' 'F3' 'F4' 'T7' 'T8' 'C3' 'C4' 'P7' 'P8' 'P3' 'P4' 'O1' 'O2'} The lateralized potential is computed on combinations of channels and not on indivudual channels. However, if you want to make a topographic plot with e.g. FT_MULTIPLOTER, you can replace the output lrp.label with lrp.plotlabel. The concept for the LRP was introduced approximately simultaneously in the following two papers - M. G. H. Coles. Modern mind-brain reading - psychophysiology, physiology, and cognition. Psychophysiology, 26(3):251-269, 1988. - R. de Jong, M. Wierda, G. Mulder, and L. J. Mulder. Use of partial stimulus information in response processing. J Exp Psychol Hum Percept Perform, 14:682-692, 1988. and it is discussed in detail on a technical level in - R. Oostenveld, D.F. Stegeman, P. Praamstra and A. van Oosterom. Brain symmetry and topographic analysis of lateralized event-related potentials. Clin Neurophysiol. 114(7):1194-202, 2003. To facilitate data-handling and distributed computing you can use cfg.inputfile = ... cfg.outputfile = ... If you specify one of these (or both) the input data will be read from a *.mat file on disk and/or the output data will be written to a *.mat file. These mat files should contain only a single variable, corresponding with the input/output structure. See also FT_TIMELOCKANALYSIS, FT_MULTIPLOTER