[Eeglablist] Oddity with ICA and Channel Power Spectra

[Steven Pillen]

Hello, EEGLAB list.

I seem to be observing a change in the power spectra after running ICA on
some data files.  Note the difference between these two images, which are
from before and after ICA was run.  No other processing was done on these:

Before:
http://imgur.com/spMyRfr


After:
http://imgur.com/jwqgBcK

Does anyone know what could possibly account for this?

Thank you,
Steven Pillen
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