From: rfphill_at_h...
Date: 2001-04-03 05:55:25
You said:
> Finally, you mentioned you were in discussion with an electrode
> supplier. What kind of electrodes are you thinking of using? Is
it
> possible to use flextrodes (from Brainmaster) which require no gel?
In response to your question about flextrodes. A quick evaluation of
this item and one might quickly realize how easily they can be
constructed with the right materials. The electrodes themselves are
standard cup types wrapped in a sponge (I think a cotton felt). The
electrode holder itself might be difficult to duplicate as it might
be a custom design. But careful inspection could yield a few
alternatives for the mechanically minded. The holders are by far the
most engineered aspect of the headgear, and it's two pieces of
plastic (not to belittle it by any way, I would buy Flextrodes in a
second if 200 dollars were easy to come by). That's an
oversimplification of course, but I think an mechanical engineer
could find a alternative design using off the shelf items in any
hardware store. Add elastic and velcro and viola! Again, I think
it's creator did a great job of designing a simple but effective
alternative to the goop methods.
The idea of using an electrolyte soaked sponge as a substitute for a
dollop of paste is not new is it? I'm asking. In my web searches in
search of an alternative to paste/gels without the cost of
Flextrodes, I think I've seen a few ideas that were similar.
Brainmaster has simply packaged the idea up in a sensible device in a
sensible manner.
I'm no engineer and a relative newcomer to NF so take my comments
with a grain of salt, I guess. I'm just envisioning a companion
design doc illustrating the building of a cheap "flextrode"-type
headgear using readily available items (to go along with a cheap eeg
design doc).
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