[Eeglablist] Power unit in spectopo

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Fri Jun 27 20:36:22 PDT 2014

Dear Anderson,

Yes, why not?

See also my past comment:
In EEGLAB, 1uV peak-to-peak sine wave power is defined to be 0dB;, 10uV is
20dB, 0.1uV is -20dB etc.

dB here can be replaced with µV2/Hz.


On Tue, Jun 24, 2014 at 11:57 AM, Anderson Oliveira <asoliv at umich.edu>

> Hi EEGLAB users,
> I’m a new user of EEGLAB, and at the moment I use the function spectopo
> for extracting the frequency spectrum of some recordings. The Power in such
> function is defined as “10*log10(µV2/Hz)”.
> My question is, if I want to report in a manuscript the power on a defined
> frequency band (e.g., the alpha band from 8-13Hz), are the values from
> spectopo already in the correct unit?
> Thanks for the attention,
> Anderson
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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