EFFECT ON THE ELECTROENCEPHALOGRAM OF CHANGING THE BLOOD SUGAR LEVEL

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Abstract
In 1939-1940 electroencephalographic observations and determinations of the blood sugar were made on a group of 43 college undergraduates under standardized conditions. An attempt was made to relate the range of blood sugar levels to the type of the electroencephalographic pattern (Davis1), the alpha frequency and the normality rating of the electroencephalogram. No correlation was found. An attempt was also made to relate the electroencephalographic pattern to the responses of the electroencephalogram during three minutes of hyperventilation. The low voltage, fast frequency types of electroencephalograms (beta or mixed fast patterns1) appeared to be more resistant to change than the alpha or mixed slow types. Aside from this, there were no consistent observations. It appears that the fasting blood sugar level of a subject has no consistent relation to the electroencephalogram. In 1940-1941 electroencephalographic observations were made on 40 healthy college students simultaneously with an "insulin tolerance test."2

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