PSD and Alpha band in EEG

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Hello, we work on the relashionship between alpha band and pain. We want to analyse the spectrum density but we have a probleme in the pre process i think. We have a lot of artefacts because of eyes mouvements and blinks. We did a SSP and ICA but that doesn't work. It tell me that "event type "blink" not found, or has no occurrence".

So we add 2 electrodes EOG to remove them in brainstorm with this code : Data(129,: ) = Data(129,: ) - Data(130,: ) ;
% data 129 and 130 correspond at the 2 electrodes. Then we did a SSP eye blink and I have the same problem...

Have you any solution ?
Have you know an other process to have the spectrum density without any artefacts ?

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Have you tried following the instructions in the tutorial on artifact removal: https://neuroimage.usc.edu/brainstorm/Tutorials/ArtifactsDetect#Detection:_Blinks

Since the frequency range of these artifacts coincides with the alpha band, there will always be some distortion, you might also try to reject segments containing the artifact.

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