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More Information:
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Requirements
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1.5 mm touchproof Electrodes - pure silver recommended and/or
HEG headset (These are included in some bundles, see above)
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What is HEG?
Hemoencephalography, or HEG, takes advantage of the fact that
the brain gives off more heat and has greater blood flow and oxygenation in
areas of high activity. HEG headbands use infrared light to measure the heat
or oxygenation of the brain to get a picture of the level of neural activity
over areas of the scalp.
There are two types of HEG, pIR and nIR:
The pIR or passive infrared headband, developed by Jeffrey
Carmen, uses an infrared thermometer to measure the temperature of the brain
at the skull under the headband sensor (temperature being an indirect measure
of brain activity in that area).
The nIR or near infrared headband, developed by Hershel Toomin,
sends pulses of red and infrared light through the skull to the brain. By
measuring the color of the light that is reflected back, the headband can
indicate how much oxygen there is in the blood, which is an indirect measure
of brain activity. Highly oxygenated blood will be redder in color.
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