brain

Extracting wavelet coherence values

In my previous blog (https://www.alivelearn.net/?p=1426) and in our paper titled “NIRS-based hyperscanning reveals increased interpersonal coherence in superior frontal cortex during cooperation” (full text pdf available ), we have shown
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24 sec read

尖椒土豆丝与自由意志

饭店里,你拿着菜单,在思考是点西红柿炒鸡蛋还是尖椒土豆丝。这个问题显然很重要,因为你已经考虑了几分钟了。最后,你下定了决心,拍了脑瓜子,说,就要土豆丝了。你如释重负。旁边的服务员可能夸你,说你做出了最
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4 sec read

人对时间的感知(原创)

我在读博期间做的研究是”人对时间的感知“,有些有意思的现象,权当饭后谈资吧。下面的研究是我的联合导师David Eagleman和他的学生做的。 —- 2006年一个普通日子的下午,王敏来
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3 sec read

SVM regression (SVR) vs Linear Regression

One particular nice thing about SVR is that the weight of each feature reflects the feature’s true contribution. If some features are highly correlated (this is common in neuroimaging data – e.g. adjacent voxel activity are very similar),
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1 min read

Artinis’ PortaLite

Note: I am not affiliated with Artinis and they don’t pay me for this post. If you also sell portable NIRS device and would like to demo to me, I am happy to see it. Marco, the salesman of Artinis, gave me a demo of their wireless/portable NIRS
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50 sec read

Find anatomical location of a list of MNI coordinates

Quite often you need to know what is the brain structure (anatomical name) of a given coordinate, say (-8, 2, 6)? Is there a program for this? The answer is yes. Please download the following matlab script: cuixufindstructure.m This program requires
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31 sec read

Secrete usage of xjview: Creating a mask based on…

Many users have created masks from a T-test image; xjView also allows you to create a mask based anatomy. Say, if you want to create a mask of Amygdala, how to do that? (You need to use xjview 8.10. 1 min video demo at http://youtu.be/31q_6jumhhM) 1.
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22 sec read

An fMRI ROI analysis program (beta)

Previously I said I was developing a ROI analysis program (https://www.alivelearn.net/?p=1421). Here it is: Download main program (beta version) at https://www.alivelearn.net/xjview/xjviewpro/xjviewpro.p Download sample input excel file: https://www.
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21 sec read

Convert coordinates in MNI space to matrix space

Quite often you need to convert the coordinates of some voxels in MNI space to regular matrix coordinates. Below is a script to do so: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% mni2cor %%%%%%%%%%%%%%%
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43 sec read