[Eeglablist] Generate Talairach coords?

[Curtis Bingham]

John, Clement, thanks for the responses. 


Allow me a follow-up question: how do I convert the talaraich coordinates into the representative Brodmann areas to show the translation of talaraich to Brodmann areas?

Sent from my iPhone

> On Sep 2, 2020, at 7:30 PM, RICHARDS, JOHN <RICHARDS at mailbox.sc.edu> wrote:
> 
> I recall that the DIPFIT coordinates derive from the coordinate system of the electrode positions in the EEGLab structure.  Many of the ELP coordinates are likely in "MNI" space, i.e., are given on the MNI head and are offsets from the AC with RAS coordinates, with MNI sizing.  MNI coordinates are not Talairach coordinates because the MNI head is a different size than the Talairach coordinates.  However I have found across systems that electrode position coordinates used in EEGlab vary widely as to what space they are in.   I have used DIPFIT for quick tests and EEG lab courses.  We use individual participant MRIs and place our electrodes on the head of the structural T1 scan and so have subject-sized AC-offset coordinates.  When we put these electrode coordinates in DIPFIT, we get back dipole coordinates that are in the subject-based space and plot in the subject MRI appropriately.
> 
> John
> 
> 
> 
> ***********************************************
> John E. Richards
> Carolina Distinguished Professor
> Department of Psychology
> University of South Carolina
> Columbia, SC  29208
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> 
> -----Original Message-----
> From: eeglablist <eeglablist-bounces at sccn.ucsd.edu> On Behalf Of Clement Lee
> Sent: Wednesday, September 2, 2020 8:09 PM
> To: Curtis Bingham <cnbingham at gmail.com>
> Cc: eeglablist <eeglablist at sccn.ucsd.edu>
> Subject: Re: [Eeglablist] Generate Talairach coords?
> 
> Hi Curtis,
> 
> The DIPFIT structure contains coordinates, although I'm not sure if they are already in Talairach coordinates. `EEG.dipfit.model.posxyz` might be all you need, but if not, the coordinate transform information is stored in `EEG.dipfit.coord_transform`
> 
> Best,
> Clement Lee
> Applications Programmer
> Swartz Center for Computational Neuroscience Institute for Neural Computation, UC San Diego
> 858-822-7535
> 
> 
>> On Wed, Sep 2, 2020 at 5:03 PM Curtis Bingham <cnbingham at gmail.com> wrote:
>> 
>> How do you generate Talairach coordinates for the independent components?
>> 
>> I want to create a chart similar to the following:
>> 
>> Also pasted here:
>> https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=fcfe17a5-a271a2cb-fcfe5964-8682c__;!!Mih3wA!Q1ehM3wJLC_vJuxWSJxRgiGBSA-L2cLphynupaCWJH80QQQxS3n2EnWXhrQhvGH3lt3u2Q$ 
>> 0851399-5f138f29d7013276&q=1&e=0c190a75-6bf2-4df2-8452-f1095634aa7d&u=
>> https%3A%2F%2Furldefense.com%2Fv3%2F__https%3A%2F%2Fimgur.com%2Fa%2FB0
>> Wl3CQ__%3B%21%21Mih3wA%21VzfGzx82nlvsP1ZoRoWCJ_Q4QVUI0YsKG_vxXhC7VCFgL
>> w_ShFVsqKB5myKZ8J0pArvptg%24
>> 
>> 
>> 
>> I’ve run ICA, then DIPFIT. Is there a plugin I should use to interface 
>> with a talairach database? Or a way to output just the dipole 
>> coordinates to plug into a database?
>> 
>> Advice welcome.
>> 
>> Best regards,
>> 
>> Curtis
>> 
>> 
>> 
>> 
>> 
>> 
>> 
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