[Eeglablist] high frequency oscillation- eeg advice

[Ahmad, Jumana]

Dear all,
Further to my email below I wondered if it were possible to use cleanline on 0.1Hz high pass filtered data or does it need to be 1Hz?
Is there any issue if you use cleanline after low pass filtering to remove line noise still present in the data?
Best wishes,
Jumana
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Jumana Ahmad
Post-Doctoral Research Worker in Cognitive Neuroscience
EU-AIMS Longitudinal European Autism Project (LEAP) & SynaG Study
Room M1.26.Department of Forensic and Neurodevelopmental Sciences (PO 23) | Institute of Psychiatry, Psychology & Neuroscience | King’s College London | 16 De Crespigny Park | London SE5 8AF

Phone: 0207 848 5359| Email: jumana.ahmad at kcl.ac.uk | Website: www.eu-aims.eu | Facebook: www.facebook.com/euaims

________________________________
From: Ahmad, Jumana
Sent: 24 January 2017 17:00:25
To: eeglablist at sccn.ucsd.edu
Subject: high frequency oscillation- eeg advice

Hi  Everyone,
I am running a large scale ERP analysis. I filtered 1-40Hz (ICA AMICA), or 0.1-40Hz for the ERP dataset. A 30Hz low pass does not help to get rid of the oscillation, which is really significant in the data. I use a butterworth filter, which is good for ERP analysis with low phase distortion.
I also already run ICA, but in some datasets there is a very significant high frequency oscillation.
I do not use cleanline, which is not typical in the literature I have been basing my pipeline on.

However, I can see the high frequency oscillations in my ERP, which is not ideal and now I need to try and get rid of it further.
Can I filter again on top of the data which already has already undergone ICA- I only use ICA to remove blinks?
Should I do cleanline, although it would have to be after ICA now- I read this is not advisable.
Should I use a notch filter?

Any help would be appreciated.
Best wishes,
Jumana

------------------------------------------
Jumana Ahmad
Post-Doctoral Research Worker in Cognitive Neuroscience
EU-AIMS Longitudinal European Autism Project (LEAP) & SynaG Study
Room M1.09. Department of Forensic and Neurodevelopmental Sciences (PO 23) | Institute of Psychiatry, Psychology & Neuroscience | King’s College London | 16 De Crespigny Park | London SE5 8AF

Phone: 0207848 0260| Email: jumana.ahmad at kcl.ac.uk<mailto:antonia.sanjose at kcl.ac.uk> | Website: www.eu-aims.eu<http://www.eu-aims.eu/> | Facebook: www.facebook.com/euaims<http://www.facebook.com/euaims>

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