New Articles about Epilepsy

Submitted by jigongjun on
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1. Epilepsy Res. 2012 Mar 12. [Epub ahead of print] Connectivity disruptions in resting-state functional brain networks in children with temporal lobe epilepsy. Mankinen K, Jalovaara P, Paakki JJ, Harila M, Rytky S, Tervonen O, Nikkinen J, Starck T, Remes J, Rantala H, Kiviniemi V. Source Department of Pediatrics, Oulu University Hospital, Oulu, Finland. Abstract

严老师,请教关于mask的使用和预处理中的数值提取问题

Submitted by taobao2010 on
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严老师: 关于mask的使用和预处理中的数值提取有以下问题想向您请教,请您指点,谢谢: 1. 使用激活图来做mask,但是发现此时的mask原料是前面生成的ALFF、fALFF、ReHo、zFC的值经过统计之后,生成的激活图,根据这些激活图,再使用一些运算,如((i1>0)+(i2>0))>0等类似的方法生成所需ROI的mask。那现在这些mask是做什么用的呢?在视频一中提到,计算ReHo、ALFF、FC时可以使用自己定义的mask,但是那时mask还没有啊。这样一来,不就相当于一个死循环了。难道只能使用default mask计算ReHo等值后,通过统计得到mask用于下一批数据? 2. 如果我想在数据预处理之后,如Normalized之后将各体素的BOLD激活值提取出来,用于MATLAB计算,应该如何提取呢?应该使用什么命令语句,或者程序呢?

BE CAUTIOUS when using FOX ET AL., 2005 coordinates

Submitted by YAN Chao-Gan on
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Lots of people used the coordinates of 6 ROIs provided by Fox et al., 2005 (Fox, M.D., Snyder, A.Z., Vincent, J.L., Corbetta, M., Van Essen, D.C., Raichle, M.E., 2005. The human brain is intrinsically organized into dynamic, anticorrelated functional networks. Proc Natl Acad Sci U S A 102, 9673-9678.). For the first ROI (IPS) of the six ROIs (IPS, FEF, MT+, MPF, PCC, LP), the Talairach coordinates is: -25, -57, -46. [Methods -> Correlation Techniques] However, this point sits in cerebellum!! Far away from the intraparietal sulcus (IPS). I guess this is a typo in that paper, the correct coordinates should be -25, -57, 46. See foci in Table 1, IPS (-23, -66, 46) (25, -58, 52). So be careful when using the coordinates from that paper.

怎么做一个适合自己采集数据dimension的全脑mask

Submitted by Candy870817 on
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我的功能像dimension是64*64*39的,voxel size 是3*3*3的,用DPARSF做数据处理,default mask是61*73*61,voxelsize是1*1*1的,和我的数据dimension不一样,我试着用rest中的reslice对default mask重采样,结果我看了下采样后的图像,脑部明显不全,我想做个64*64*39的mask,请问怎么做呢?因为我的实验是探索性的,是对整个脑部哪一部分激活的探索,所以想请教下各位谁能帮我解答下怎么做一个适合自己数据的全脑mask

A question about mask

Submitted by Chen0075 on
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严老师,您好! 想请教一下:我做correlation analysis 或者 two-sample t-tests 时限定了一个MASK(是我自己新生成的文件,不是REST软件里面的default mask)。然后,我用REST AlphaSim跑了校正用的数据。最后,我用Slice iewer 查看结果。我想知道的是:查看结果时,分别输入p value 和cluster size,那么这时候REST是否把这个多重比较校正的过程也自动限定在了MASK中? 谢谢!

严老师,请问视频对应的ProcessingDemoData中时间点如何确定

Submitted by taobao2010 on
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严老师: 我刚接触静息态数据处理,看了您的在线视频,也下载了ProcessingDemoData示例数据,但是其中没有提供time points的参数。 我的理解是1个TR(包括33Slices)扫描了整个大脑的数据,time points=(总实验时间)/TR,这样的理解对吗? 给出的示例数据文件中,一个被试有240个.dcm文件,不知道这个240和time points之间是否有关联,请指教,谢谢。

Regarding DARTEL

Submitted by accyang on
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Hi All, Suppose I have 20 subjects and split them into two groups (10 each). Instead of running DPARSFA with DARTEL on all 20 subjects at one time, I ran DPARSFA twice with DARTEL option for each group. Can obtained normalized images be still compared between groups? Thanks -Albert

two papers about resting-state fMRI

Submitted by yuanbinke on
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1.Individual Functional ROI Optimization Via Maxim ization of Group-Wise Consistency of Structural and Functional Profiles Kaiming Li -Neuroinform,2012. http://www.springerlink.com/content/4711w8wj63m19g63/ 2.The Synchronization within and Interaction between the Default and Dorsal Attention Networks in Early Infancy Wei Gao-Cerebral Cortex,2012