at drinking alcohol relieves this state. Using an EEG to test for hyperexcitability can help diagnose this condition at an early age, and medication can be given to relieve this, thus preventing alcoholic and drug addictions. (Alcohol Clin Exp Res H, Begleiter via Hazelden.org)
             Positron Emission Tomography is conducted by injecting sugar with charged "positrons" into the bloodstream. Brain cells pick up these positrons, which give off weak radioactive signals. Scientists then measure the color and density of the positron emission to determine different brain diseases. The blood flow which contains the sugar is most intense at red and least at blue. PETs are used to show where there is an increase or decrease in blood flow for certain diseases. For epilepsy, 80% of patients experience an increase in blood flow in the cerebral cortex during a seizure and also a lack of blood flow between seizures. (http://www.chm.bris.ac.uk/webprojec
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