Frontal asymmetry analysis

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nyquist
Posts: 1
Joined: Tue Feb 07, 2012 10:50 am
Location: United Kingdom

Frontal asymmetry analysis

Post by nyquist » Tue Feb 07, 2012 11:18 am

I am currently following what appears to be standard protocol for the EEG measurement and calculation of alpha frequency asymmetry across frontal hemispheres.

We have recorded in 8 one-minute segments (eyes-open, eyes-closed; denoted by biosemi markers in the BDF file). We want to the sub-epoch the data into 2-second windows, overlapping by 50%.

Artefact-free 2-second windows should then be converted to 2-second Hamming windows and put through an FFT.

However, at this stage, I cannot seem to find the best method to sub-epoch into 2-second windows based around the markers.

I am working in Matlab, with custom scripts and EEGLAB. I thought perhaps the pop_epoch function may be of use here but unsure on exactly how.

Any help would be appreciated.

neuropacabra
Posts: 3
Joined: Fri Sep 09, 2016 6:36 pm

Re: Frontal asymmetry analysis

Post by neuropacabra » Fri Sep 09, 2016 7:08 pm

hey mabye you (or others) will find this helpful https://neurosciencemike.wordpress.com/ ... or-eeglab/

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