[Eeglablist] Poor ICA Decomposition/Strange Scalp Maps
CNICASTRI at BWH.HARVARD.EDU
Mon Jul 19 12:32:19 PDT 2021
I am wondering if anyone can help give me some more information on a possible reason my ICA decomposition is so poor. A picture of the first 35 scalp maps is linked below. This data was collected on a 128 channel system (BioSemi/ActiView System)
1. Import, resample at 256Hz (collected at 512)
2. Re-Reference to Mastoid channels
3. Filter: highpass .03Hz, low pass 40Hz
4. Epoch to 1.2s epochs
5. Identify channels to interpolate and epochs to reject
6. Runica, component rejection
Are there any large errors here? I’ve never seen components like this. The data is a bit noisy but not worse than other data previously collected on this system. Any ideas?
Clinical Research Assistant
Division of Cognitive and Behavioral Neurology
Center for Brain/Mind Medicine, Brigham and Women’s Hospital, Harvard Medical School
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