[EEG] low budget EEG project

Kelly hurtstotouchfire at gmail.com
Tue Jul 13 12:56:50 PDT 2010


I can meet this Sunday if you guys want to.

-Kelly

On Tue, Jul 13, 2010 at 12:50, Maria Mouk <mariamouk at gmail.com> wrote:
> im completely new to the group-
> but would love to learn more about EEGs
>
> more specifically the effects of music on our system
> but really any waveform watch would be informational interesting and new
>
> please let me know if anyone is motivated to bring this back =D
>
> maria mouk
>
> On Tue, Jul 13, 2010 at 11:20 AM, Kelly <hurtstotouchfire at gmail.com> wrote:
>> For reference in case any readers are not familiar with sleep EEG:
>> http://en.wikipedia.org/wiki/K-complex
>> http://en.wikipedia.org/wiki/Sleep#NREM_sleep
>>
>> It seems to me that it depends what you want to do with your sleep
>> data. You can probably characterize the transition from wake to sleep
>> no problem with power spectrum data alone. Stage 2 sleep and waking
>> alpha are sometimes similar though as far as just the power spectrum
>> goes, without being able to look for k-complexes and spindles. You
>> might be able to differentiate k complexes based on voltage though.
>> Other than eye movement during REM, you shouldn't have too much high
>> voltage activity once you're actually sleeping.
>>
>> Given the charts in the first link, it should be possible. I'm
>> skeptical of their gamma, but the <35Hz data is totally reasonable. I
>> think that the big win is that it's a fully packaged device already,
>> with bluetooth/wireless built in. A lot of the hassle with eeg comes
>> in just tweaking little stuff to get good contact and shield from
>> noise. Do you know if the Neurosky electrodes are active? I have
>> trouble imagining they could get that data from passive electrodes.
>> And if they're active, that's a pretty big win, because active
>> electrodes are a little bit of a hassle to build. It would probably be
>> worth trying to hack directly into the connection and get the raw data
>> if they're active, because then we could harvest readymade active
>> electrodes... That sounds nice.
>>
>> You should talk to Andreas, by the way. He's building his own caps from scratch.
>>
>> I was just thinking earlier today that it's a bummer that doing EEG
>> for a living has killed my drive to hack it in my spare time. I'm sure
>> it will reassert itself when I'm not working so much.  In theory, EEG
>> meets on Sundays, but no one goes anymore. I'm not sure how
>> Sensebridge will fare without Eric. Feel free to rally people to work
>> on this stuff, Dan. And best of luck.
>>
>> -Kelly
>>
>> On Tue, Jul 13, 2010 at 10:20, Dan Brown <danbrown at gmail.com> wrote:
>>> Similar to what Tracy sent out recently, there are some blog posts
>>> about using the EEG modules from Neurosky used in toys for collecting
>>> EEG data:
>>> http://ericmika.com/itp/brain-hack
>>> http://webcache.googleusercontent.com/search?hl=en&source=hp&q=cache:http://www.epokh.org/blog/%3Fp%3D298
>>>
>>> Based on these examples, I am planning to build a mindflex+bluetooth
>>> radio, which I expect to provide the 8 frequency-band strength numbers
>>> to a bluetooth host, eg a laptop or mobile phone. Fwiw, I am most
>>> interested in monitoring brain activity during sleep. If anyone is
>>> interested in this project, let me know and we can set up some times
>>> to work together at noisebridge.
>>>
>>> It would be even better to get the raw EEG waveform data from the
>>> device, but I'm not sure if these cheap Neurosky modules are capable
>>> of sending that data. Anyone have any suggestions about that?
>>>
>>> Dan
>>> _______________________________________________
>>> EEG mailing list
>>> EEG at lists.noisebridge.net
>>> https://www.noisebridge.net/mailman/listinfo/eeg
>>>
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>>
>
>
>
> --
> Maria Mouk
> 917-405-4518
>
> -documentation-
> -dissemination-
>



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