[Eeglablist] Wrong channel location with MNI brain model
李想
lxraplikelx at qq.com
Thu Nov 26 18:28:50 PST 2015
Dear Makoto
Thanks for your reply!
Actually, I had another problem with MNI template, that was, I did not get reasonable results of DIPFIT when I used MNI instead of BESA template. The dipole plot showed that the position of dipoles were definitely wrong since it was like located at the opposite side of fair positions I guess. I tried twice to use this way you suggested, but finally gave up with this problem. And I had seemingly good results with BESA template. Until now, I still have no idea about it. What possible reasons could cause this kind of problem? I will turn to documentation of eeglab and fieltrip for more details about dipfit as well.
Thank you for your always being warm-hearted to helping us.
Best,
Li Xiang
------------------ 原始邮件 ------------------
发件人: "Makoto Miyakoshi";<mmiyakoshi at ucsd.edu>;
发送时间: 2015年11月27日(星期五) 上午8:54
收件人: "李想"<lxraplikelx at qq.com>;
抄送: "EEGLAB List"<eeglablist at sccn.ucsd.edu>;
主题: Re: [Eeglablist] Wrong channel location with MNI brain model
Dear Xiang,
When you put FCz back to the channels, follow these steps: you first enter the name FCz, then find channel locaitons, and finally optimize head center. This can't go wrong.
Makoto
On Mon, Nov 2, 2015 at 11:21 PM, 李想 <lxraplikelx at qq.com> wrote:
Dear list
I found a problem when I loaded channel locations with MNI model, but this problem was absent with the BESA model. The problem is when I use MNI model to load channel location and get FCz back in data which is the online reference electrode, and I also optimize center location as Makoto's pipeline suggests. But the result is that the position of FCz is totally wrongly located which you can see in the image.
image: https://copy.com/izHOmdMe9x4EUkli
does anybody encounter this same problem before? and could you please give me some suggestions?
Sincerely!
Li Xiang
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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