Hello to all
I use the envelope correlation method to extract functional connections.
In the envelope correlation method, there are two methods: Hilbert and Morlet transform
As we know these two methods are applied to pre-processed data.
what is the theory of these two methods (Hilbert and Morlet transform)?
What effect do these two methods have on the EEG signal? which envelope correlation is calculated as a result
Hi,
Details on Hilbert and Morlet wavelet transforms can be found in the Additional documentation section in the Time-frequency tutorial:
https://neuroimage.usc.edu/brainstorm/Tutorials/TimeFrequency#Additional_documentation
Pearson's linear correlation is computed between the power envelopes, as in (Hipp et al., 2012).
https://doi.org/10.1038/nn.3101