[FieldTrip] Help with units of measurements with ft_sourceanalysis

Sara Cinelli sara.cinelli at studenti.unipd.it
Tue Oct 22 15:31:17 CEST 2024


Hello everyone,

I have a question that is creating me some issues. I would like to ask
you about the unit of measurements I have to use in the
ft_sourceanalysis function. I already know that the data in input for
ft_compute_leadfield (sourcemodel,headmodel and elec) has to be in the
standard unit,i.e. meters (m) and volt (V), in order to obtain the
measure in V/A*m.

My question is the following: my TEP measure is microV and the elec
unit is mm. Do I have to change the measures in V (and in m), so
multiply the avg*10^-6? The TEP obtained from ft_timelockanalysis has
differents measure inside, in particular the covariance. Do I have to
change these other measures as well? If so, how? Thank you very much!


Sara
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