[Eeglablist] Proper methods for endogenous ERPs

[Beach, Paul Anthony]

All,

I’m curious about proper technical methods for analyzing an endogenous ERP, the heartbeat evoked potential (HEP). So far, to measure the HEP, I’m using ERPLAB after labeling R wave and T wave peaks on files containing simultaneous post-processed (prior to ICA) EEG/EKG. One can measure HEPs time-locked to either the R or T wave and I was interested in examining both in patient v control groups.

My question is, at the single-subject level:
1) Is it appropriate to analyze R and T-wave related HEPs by making one file containing both R & T-wave labeled events, with subsequent extraction of event-based epochs and ERP computation from there
Or
2) Is it more appropriate to create separate files (one with labeled R wave events, another with T wave events) and THEN create event-based epochs to measure the HEP for each?

Sorry if this is a rather simple ERP-related question. I’m an eeglab/ERP novice.

Thanks!
Paul
--
Paul Beach DO, PhD
Department of Neurology
Emory University School of Medicine






________________________________

This e-mail message (including any attachments) is for the sole use of
the intended recipient(s) and may contain confidential and privileged
information. If the reader of this message is not the intended
recipient, you are hereby notified that any dissemination, distribution
or copying of this message (including any attachments) is strictly
prohibited.

If you have received this message in error, please contact
the sender by reply e-mail message and destroy all copies of the
original message (including attachments).