Canolty ERP Units?

[mcp0228]

Hi there,
I would like to know the units of the Canolty ERP produced from running the Canolty map process.
From going through the tutorial and running the Canolty map process I can see that the ERP is unitless.
https://neuroimage.usc.edu/brainstorm/Tutorials/Resting#Canolty_maps

After going through the below forum and the source code of the Canolty map process, it looks like Zscore normalization was done. Therefore would it be correct to say that both Canolty map and ERP are unitless z-score measures?

Interpreting Canolty Maps

Dear all, I am struggling here with Canolty maps a little bit. As you can see in the figure, I exported the Canolty map (low frequency: alpha / higher frequency: gamma) TF matrix from brainstorm and plotted in Matlab for one region. However, I am not sure what are the units for the y-axis because power and magnitude can't be negative and here we can see negative values. But in the PAC tutorial, it was mentioned that Canolty is a type of time-frequency decomposition so I assume that it is some …

[Sylvain]

The time series associated with the Canolty maps should be in the native units of the neurophysiological time series. As explained in the thread you refer to, the Canolty spectrograms are z-scored over the epoch duration for each frequency bin.