[Eeglablist] Different clusters within thalamus?

[Aleksandra Vuckovic]

My modest understanding is that thalamus generates rhythmic oscillatory activity and is one of the generators of the alpha rhythm. I taught therefore that it should not be surprising that some ICs are located in thalamus. However Tom's email indicates that the source analysis model used in EEG lab is not adequate for localising sources in deeper structures, or I got it wrong?
Thanks,
Aleksandra

________________________________
From: Makoto Miyakoshi [mmiyakoshi at ucsd.edu]
Sent: 19 March 2013 17:14
To: Aleksandra Vuckovic
Cc: EEGLAB List
Subject: Re: [Eeglablist] Different clusters within thalamus?

Dear Aleksandra,

>Even some that I see consistently across subjects?

Consistency across subjects does not increase the possibility that the ICs are really located in or near thalamus, unless you are using the combination of digitized channel locations, subject's MRI head image, and Zeynep Akalin Acar's NFT...

To generate a dipole, neuron arrays should have a specific pattern. I'm not sure if thalamus also has this pattern. It's a matter of cytoarchitecture, so you may want to read papers about electrophysiological mechanism of generating EEG. I don't know much about it, so if you find something interesting please share with us.

Makoto

2013/3/19 Aleksandra Vuckovic <Aleksandra.Vuckovic at glasgow.ac.uk<mailto:Aleksandra.Vuckovic at glasgow.ac.uk>>
Hi
does it mean that these sources are not of a physiological origin (EEG related)? Even some that I see consistently across subjects?
Many thanks,
Aleksandra

________________________________
From: Makoto Miyakoshi [mmiyakoshi at ucsd.edu<mailto:mmiyakoshi at ucsd.edu>]
Sent: 19 March 2013 00:27
To: Aleksandra Vuckovic
Cc: eeglablist at sccn.ucsd.edu<mailto:eeglablist at sccn.ucsd.edu>
Subject: Re: [Eeglablist] Different clusters within thalamus?

Dear Aleksandra,

Independent components located in or near thalamus should be mostly due to localisation error in dipole fitting (forward model error/inverse solution error/channel location error/...etc). We see it often though :-)

Makoto

2013/3/16 Aleksandra Vuckovic <Aleksandra.Vuckovic at glasgow.ac.uk<mailto:Aleksandra.Vuckovic at glasgow.ac.uk>>
Hi
has anybody tried to cluster components at different locations within thalamus and according to which criteria?
Many thanks!
Aleksandra

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--
Makoto Miyakoshi
JSPS Postdoctral Fellow for Research Abroad
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego



--
Makoto Miyakoshi
JSPS Postdoctral Fellow for Research Abroad
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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