[Eeglablist] slow frequency drift

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Thu Jan 23 18:33:05 PST 2014


Dear Eduardo,

For line noise, use CleanLine.
For slow frequency drifting, you may either 1Hz high-pass (make sure you
are using the latest EEGLAB since filter function underwent major update
between 11 and 12) or linear detrending that you can use as a proprocess
for SIFT by Tim Mullen. These methods don't reject datapoints.

clean_rawdata also has a high-pass. You may want to try more aggressive
parameters. ASR is not much for baseline drift correction.

Makoto


2014/1/22 eduardo schenberg <edueeg at gmail.com>

> Hello all
>
> I used ICA to remove line noise and movement artifacts from my continuous
> data, but some slow frequecny drifts are still present and clearly visible
> on the tracings, also affecting yhe spectrum at these freqs
>
> I already tried the "clean_rawdata" plugin to remove these drifts, but it
> seemed to also affect (unfortunately) alpha oscillations
>
> Is there any other options to correct these drifts (without deleting data
> segments) that any of you would recommend?
>
> many tks
>
> eduardo
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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