Resting-state fMRI topics

请教一个关于global signal regression的问题

在Kevin Murphy(The impact of global signal regression on resting state correlations: Are anti-correlated networks introduced?)一文中:global signal regression is used as a regressor in a general linear model (GLM) to remove the associated variance.This technique assumes

咨询

严老师: 您好,我做了REHO的双样本t检验,结果如下:
为什么会有激活区跑到脑外去?是我采样的问题还是处理过程中出了问题?单样本T检验的激活区都是在脑内,而且做的ALFF的值也都是在脑内,唯独REHO的双样本T检验出现了这种情况。希望能得到您的帮助。

Questions on DPARSFA

1. Should I use smReHO - 1 or just smReHO for a paired t-test?
2. In ExcludeSubjects.txt what is the default or recommended criteria for excluding subjects?
3. Which of the DPARSFA choices does NOT effect ReHo analysis? For example, if I check "smooth" will it smooth the data before ReHo or does "smooth" only apply to fALFF, ALFF, and FC analysis?

the same question with `Results may be inaccurate. RCOND = 1.034803e-027` which was posted at Thu, 02/17/2011

Dear REST experts,

I encounter the same problem with `Results may be inaccurate. RCOND = 1.034803e-027` which was posted at Thu, 02/17/2011. I was not able to find the answer in the forum about that.

Would you mind explaining how can I solve this problem?

Thank you in advance.
Yours sincerely,
Yuki Sakai

Subscript indices must either be real positive integers or logicals.

Hi again,
When I try to run the analysis on REST using the functional connectivity tab, I get the following error message. Does anyone know what indices the message is referring to? My header and img files have this label: 20101118_1621541BlankCTRLs003a001_120.img (or hdr).
Thank you very much.
Yoon-Hee

Exception occured. (MATLAB:badsubscript)