Disambiguating different covariation types
Covariations in neuronal latency or excitability can lead to peaks in spike train covariograms that may be very similar to those caused by spike timing synchronization (see companion article). Two quantitative methods are described here. The first is a method to estimate the excitability component of a covariogram, based on trial-by-trial estimates of excitability. Once estimated, this component may be subtracted from the covariogram, leaving only other types of contributions. The other is a method to determine whether the covariogram could potentially have been caused by latency covariations.
Brody
CD
Lab 126, Instituto de Fisiologia Celular S/N, Ciudad Universitaria, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-523 C.P. 04510, Lab 126, Mexico DF 04510 MEXICO. cbrody@ifcsun1.ifisiol.unam. mx.