EEGLAB time frequency analysis question
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The figure above is the EEGLAB sample data and the figure below is the time frequency analysis result for the EEG data I measured. The difference between the two figures is clear, and I don't know why my data shows that shape. I don't know how to get the data in a clear and tidy form like the sample data. Is my measurement method wrong?
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Angelo Yeo
2023-8-7
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No one can answer whether your measurement method is wrong or not only with the figure you provided.
However there are a few things I can find:
1) The second figure does not show you a signal from a channel but an independent component. This does not show you the channel activity but a linear combination of all the signals.
2) The first IC components shows the biggest signal component. Most of the time, this includes eye movement but I do not see any eye movement-related signals but a very big activity on the left parieto-occipital region.
3) It seems like you are performing an event-related experiment. However, the ERP signal does not show you any ensembled activity locked at 0 sec. Did you epoch correctly? And why aren't there any baseline time period?
I don't think this is from brain activity. It might be a noise component from outside.
2 个评论
Angelo Yeo
2023-8-8
It's good to know that the issue is resolved! Thank you for leaving the comment.
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