March 2011

关于ReHo 的问题

老师您好, 我已经比较了病例组和对照组的ReHo双样本T检验,然后想进一步做ReHo值和临床指标之间的相关分析,是不是在T检查的结果上选择每个有差异的地方进行分析呢? 还是计算全脑的ReHo 值和评分之间的关系?具体该怎么操作?请指教,谢谢!

Memory Error doing anything in DPARSF

Hello,

I am analyzing fMRI NIFTI data that has already been converted by SPM on a Windows machine.

I'm getting an 'out of memory' error when I try to do anything, along with some other errors I don't understand. This computer has a decent amount of RAM (1.5 GB), I've tried closing all other programs, and tried 3 GB mode. Any idea what is going wrong?

A new electrophysiological study for human posteromedial cortex from PNAS

Proc Natl Acad Sci U S A. 2011 Feb 15;108(7):3023-8. Epub 2011 Jan 31.

Differential electrophysiological response during rest, self-referential, and non-self-referential tasks in human posteromedial cortex.
Dastjerdi M, Foster BL, Nasrullah S, Rauschecker AM, Dougherty RF, Townsend JD, Chang C, Greicius MD, Menon V, Kennedy DP, Parvizi J.

Reho ,功能连接的一些问题

严老师,您好,我是湖南中医药大学的一名研究生,我们选择了一些正常受试者做了静息态的脑功能连接,分为4个状态,即静息态,静留针态,电针刺激态,拔针后效应态。已经经过初步处理得到了一些数据,结果有10个受试者的数据符合要求,我想请教您几个问题,好吗?
(1) 我想看单个受试者在每个不同状态的激活图像也是用rest slice viewer看吗?我打开后,得到的图像如下:

p值还需要设定吗?为何结果看起来满脑都是激活点,我发现通过移动Threshold可以让激活点改变,但为何p值总为1,不能更改吗?那我应该如何确定Threshold值呢?
(2)我用dparsf做的功能连接,软件已其经Fisher转化为了Z值,那我应该如何看到存在功能连接的每个脑区的平均Z值结果呢?