[Eeglablist] Mastoid Signal

[Herbert J Gould (hgould)]

In Neuroscan you are collecting from all electrodes.  So once you have collected just do a re-reference to a good channel.  However, you have to remember that doing this may significantly change the visualization of the response. For instance if you were to re-reference to Cz your signals would invert.

Herbert Jay Gould, Ph.D.
Associate Professor
School Communication Sciences and Disorders
The University of Memphis


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From: eeglablist-bounces at sccn.ucsd.edu [mailto:eeglablist-bounces at sccn.ucsd.edu] On Behalf Of James Kean
Sent: Wednesday, January 23, 2013 9:46 PM
To: eeglablist at sccn.ucsd.edu
Subject: [Eeglablist] Mastoid Signal

G'day guys

This may not be the right forum to ask so you can just tell me where to go if it's not but I wanted to ask about mastoids.

I am testing children aged 6 to 14 years, with behavioural difficulties, as you can imagine they are quite difficult to get a clean EEG signal from.
On occasion a mastoid will dislodge slightly or the child will itch it giving it a bad signal...

My question is this:
Is there a way to tell whatever program you're using like EEGlab or Neuroscan to use the signal from the clean mastoid rather than the bad mastoid?
OR to use majority of the signal from the good one and less from the bad one?

Just wanted to know because these kids tend to wriggle a lot causing these kinds of problems.

If anyone knows that'd be a great help.

Cheers
James


--
James Kean
PhD Candidate
Swinburne Centre for Human Psychopharmacology
Hawthorn, Australia
JKEAN at swin.edu.au<mailto:JKEAN at groupwise.swin.edu.au>
Ph:  9214 5242
Mobile: 0425 735 847

For information on Brain Health, Developmental Disorders and Natural Medicines
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