[Eeglablist] Bipolar HEOG and VEOG channel locations

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Mon Nov 17 10:57:56 PST 2014

Dear Nike,

Unfortunately I can answer to only one of your questions.

> 3. Is using monopolar channels for EOG better than using bipolar channels.

Yes definitely.


On Sun, Nov 16, 2014 at 11:12 PM, Nike gnanateja <nikegnanateja at gmail.com>

> Dear list,
> We are using a Neuroscan 64 channel Synamps2 equipment at our lab. We use
> bipolar channels for the EOG recordings. When I import the recordings into
> eeglab and try to load the electrode locations from the existing sample
> locations, it assigns a single location to the bipolar channel. But
> actually, they are from two differential electrodes.
> Here are myquestions
> 1. how do I add a separate reference channel to the EOG  Bipolar channel?
> 2. Does addition of a separate reference channel to the EOG electrodes
> actually matter? What I have visually observed is that the scalp topography
> of the eye movements are falsely lateralized, and the actual dipolar nature
> of the horizontal movements not clearly visualized in the EOG channels
> 3. Is using monopolar channels for EOG better than using bipolar channels.
> regards
> Nike
> --
> G Nike Gnanateja, MSc (Audiology) <http://goog_636235333>
> Junior Research Fellow,
> Department of Audiology,
> All India Institute of Speech
> and Hearing Mysore-06
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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