From: John Morrison (jmorrison_at_ahc.net.au)
Date: 2002-02-05 13:26:37
I put the idea forward as an alternative to paste as someone said it was
messy.
As Jim said there is a LOT of practical problems with it though. :-)
:-) nothing ventured nothing gained :-)
But to dreaming of software. :-)
John
> -----Original Message-----
> From: Doug Sutherland [mailto:wearable_at_earthlink.net]
> Sent: Tuesday, 5 February 2002 5:42 AM
> To: buildcheapeeg_at_yahoogroups.com
> Subject: Re: [buildcheapeeg] Re: electrode idea
>
>
> John,
>
> I'm not an expert like Jim on analog or capacitance, etc, but
> I've played with EEG. IMO we need to stick with proven
> methods, not reinvent wheels. I think Jim is of the same kind
> of mentality as me re "less is more" and "keep it simple"
> and "make it work before extending". So, re electrodes,
> remember, this is your SOURCE of data, and if Joerg
> builds the BEST amplifier, it will be useless if the electrode
> connection is faulty. Therefore, I already know what I am
> planning to do, I am going to buy medical electrodes,
> 10/20 paste, and follow the traditional prep methods.
> I have some links to info on electrodes here ...
>
> http://home.earthlink.net/~wearable/biopsy/#biofeedback-sensors
> http://home.earthlink.net/~wearable/biopsy/#measurement-eeg
>
> Namaste,
> Doug
>
>
>
> John Morrison wrote:
>
> > Thanks
> > So what I get from that is
> > "Because of the irregular surface of the skin, such
> high capacitance can
> > not be attained by just pressing metal electrodes on the skin.
> Therefore we
> > do not believe in the concept of a dry electrode for high quality
> > bioelectric measurements, and as a result we do not offer such an
> > electrode."
> >
> > But if the electrodes were pins (NOT sharp) then the
> irregular surface
> > wouldn't be a problem and the GUNK factor would disappear. :-)
> >
> > ___________/-------
> > |||||||||||
> > SKIN
> >
> > Anyway We'll see
> >
> > John
>
>
>
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