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    Thread: Halograph Electroencephalograph

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      Halograph Electroencephalograph

      Ten years after I was able to afford my first printed circuit board from Olimex, I finally have an EEG that I can record my sleep with tonight.

      It can be worn with the sensors on the forehead by the Frontal Lobe to trigger on the spikes in electrical activity caused by the eye movements or at the back to monitor the brainwaves by the Occipital Lobe where visual perception is processed. Check it:



      I will upload the logs to the Lucid Scribe Database project if I catch any dreams.
      Zoth and Ctharlhie like this.

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      Interesting. What brain wave state are you looking for in particular?

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      Thanks. I am looking for the dream state - REM sleep.

      I uploaded the first recording during which I woke up from a dream at 05:34 am: LSDBase.org/2013/05/24/Open-Electroencephalography/.

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      REM is very similar to waking state, even resembles beta with slight differences.

      I am interested in what you are doing and will be following you, please keep me posted with your progress.

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      Yes, the most significant resemblance I have seen is from the current produced by moving the eyes.

      I recorded this the other night; this image shows the values when I am still and not moving my eyes:


      And this image shows what happens when I move my eyes around:

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      What I have found using numerous EEG devices is that muscle artifacts affect your output to a huge degree (which in your case you could take advantage of). There are a couple of well known EEG devices whose output is completely swamped by muscle artifacts and where there is insignificant EEG data within the trace. In my view those devices are a complete waste of time. I would have thought that if you're looking for a REM trigger you may find it easier to watch for muscle movement.

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      Exactly. I use the spikes from the eye muscle artifacts to trigger audio tracks.

      From http://science.education.nih.gov/sup...info-sleep.htm:

      "REM sleep and dreams are associated with each other, but they are not synonymous. While REM sleep is turned on and off by the pons, two areas in the cerebral hemispheres (areas far from the pons that control higher mental functions) regulate dreaming.
      REM sleep and dreaming can be dissociated from one another, as seen after the administration of certain drugs or in cases of brain damage either to the pons (loss of REM sleep but not of dreaming) or to the frontal areas (no dreaming but REM sleep cycle unaffected). Consequently, REM sleep appears to be just one of the triggers for dreaming."

      Which EEG devices do you have?

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