[Eeglablist] Reference free in BIOSEMI

[Makoto Miyakoshi]

Dear Hoorisa,

> How I can deal with processing of '' BioSemi reference free''? Should I
choose average reference?

Some reference should be provided in the end. We've been using average
reference, but it's changing recently. See these works.

http://www.neuro.uestc.edu.cn/rest/
http://journal.frontiersin.org/article/10.3389/fninf.2015.00016/abstract

The point of the second ref is that when you run average reference make
sure that you include good channels only.

> Also I have continuous data without events. Is there anyway to see
topography without events?

If you use ICA... because it generates a spatial filter that is time
invariant, you can see topography. Otherwise, you have to use topoplot()
function. It's easy to use. Type 'help topoplot' and give it a try.

> Additionally, that'd be nice if someone can list preprocessing and
processing steps for continuous data.

You should tell us what you want to do. I guess Simon's NBT is a good fit
for you. See below.

You can quantify the EEG using a NBT toolbox (see www.nbtwiki.net), which
is also a plugin to EEGLAB. The NBT toolbox offers several ways of
quantifying the EEG in both the spatial, temporal and spectral domain, you
can also easily add your own algorithms.

Makoto

On Thu, Jul 2, 2015 at 4:10 AM, Hoori Sa <hoorisa33 at gmail.com> wrote:

> Hi
>
> How I can deal with processing of '' BioSemi reference free''? Should I
> choose average reference?
>
> Also I have continuous data without events. Is there anyway to see
> topography without events?
>
> Additionally, that'd be nice if someone can list preprocessing and
> processing steps for continuous data.
>
> Thanks in advance.
>
> Best,
> Hoorisa
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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