[Neuro] Eyes-open EEG stimulation via the ear canals

[Gregory Perry]

For the initial tests, the only thing touching the subject were the acrylic light pipes so I think EMI can be ruled out from the output stage on the photic stimulation system.

The brainwave responses are consistent driving of EEG with a discernible pattern that seems closely correlated to the stimulation sequence from the photic stimulation device, observed at two electrode sites.  Needs more testing and user feedback obviously.

I am going to rework the prototype design to lower the cost, potentially with the use of lower cost audio components for the earphone drivers.  Hopefully this will make the project more palatable from a budget perspective.

________________________________
From: neuro-bounces at lists.noisebridge.net [neuro-bounces at lists.noisebridge.net] on behalf of John Ellis [neurofog at gmail.com]
Sent: Wednesday, October 10, 2012 2:44 PM
To: Andreas Stadler
Cc: neuro at lists.noisebridge.net
Subject: Re: [Neuro] Eyes-open EEG stimulation via the ear canals

The induced artifact from photic stim cable being close to an EEG lead is very different from induced brainwaves.
The artifact is very spikey, whereas induced brainwaves are sinewave in appearance.

-John


On Wed, Oct 10, 2012 at 11:40 AM, Andreas Stadler <rain at meta-mind.de<mailto:rain at meta-mind.de>> wrote:
this is cool, if the proposed method realy works
without opening up the skull.

keep in mind, that any electronic equipment,
near, or even in electrical contact with the body,
especially electronic pwm pulses, etc.
will create noise signal artefacts
that the eeg-amplifiers will pickup.

i don't discard the possibility though,
that something like this is theoretically possible.


Gru:Cce

~MeTa | MeTaVoluti0N MeTaMecHanICs | www.Open-BCI.org<http://www.Open-BCI.org>
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