A Near Infrared Spectroscopy is a newer technique that is still being developed. NIRS relies on the discovery that oxygen, that is contained in blood, gives off light waves close to infrared (approx. 700-1000nm). A special sensory and be attached to a subjects forehead to measure the amount of light being produced and thus give scientists an idea of how much activity is taking place. Current technology is limited to the Prefrotal cortex but this technology is still young.

It is attractive to researchers because of its portability and low cost. This is huge since many of the other techniques currently being used are very large and have a price tag that can easily get into the hundreds of thousands of dollars. The NIRS also poses no risk to the subject which is always a very important issue.

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