Oxygenation and Blood Concentration Changes in Human Subject Prefrontal Activation by Anagram Solutions
Part of the
Advances in Experimental Medicine and Biology
book series (AEMB, volume 510)
The goal of this five year project has been to better understand learning and problem solving, and eventually to make a classroom “Cognoscope” using Near Infrared (NIR) imaging. This will let us measure cognitive function online with students. Our imager measures cognitive activated oxygenation and blood concentration of changes in the prefrontal cortex. The scan time is one second, with 50 millisecond per light flash. We use a 3 wavelength LED, the advantage of which is FDA approval is not needed for power higher than 100 microwatts, while a laser diode at over 100 microwatts requires Class III regulations and switches, yellow stickers, and dead man contacts. Small silicon diode detectors with IC are used for detectors which are followed by sample and hold, ADC and signal processing giving a simultaneous time course of 18 outputs.
KeywordsRespiration Glutamine Transferase
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© Springer Science+Business Media New York 2003