[Eeglablist] Different clusters within thalamus?

[Makoto Miyakoshi]

Dear Aleksandra and Tom,

> 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?

My naive thought is that thalamus is involved in alpha rhythm but that does
not mean it project it to the scalp. It is one of nodes of network that
drives the occipital cortical patches to oscillate in alpha. Let me know if
you find more information about it.

Tom's input is informative as usual. Thanks.

Makoto

2013/3/19 Aleksandra Vuckovic <Aleksandra.Vuckovic at glasgow.ac.uk>

>  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>
>
>>  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]
>> *Sent:* 19 March 2013 00:27
>> *To:* Aleksandra Vuckovic
>> *Cc:* 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>
>>
>>>   Hi
>>> has anybody tried to cluster components at different locations within
>>> thalamus and according to which criteria?
>>> Many thanks!
>>>  Aleksandra
>>>
>>> _______________________________________________
>>> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
>>> To unsubscribe, send an empty email to
>>> eeglablist-unsubscribe at sccn.ucsd.edu
>>> For digest mode, send an email with the subject "set digest mime" to
>>> eeglablist-request at sccn.ucsd.edu
>>>
>>
>>
>>
>>  --
>> 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
>



-- 
Makoto Miyakoshi
JSPS Postdoctral Fellow for Research Abroad
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20130322/9e495094/attachment.html>