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JOHN B. DYNES, M.D.

Arch Neurol Psychiatry. 1947;57(1):84-93.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

ALTHOUGH most persons spend approximately one third of their lives sleeping, and although considerable time and study have been expended in the elucidation of this phenomenon, little is known about it. It is recognized that certain phenomena occur during sleep¹: There is a generalized muscular relaxation which roughly parallels the depths of sleep; the temperature of the body falls; tendon reflexes tend to diminish and may disappear; breathing becomes periodic, and there is a slight acidosis, with increase of carbon dioxide in the blood. Contrary to earlier theories regarding the blood supply of the brain in the sleeping state, it is now fairly well established that there is no anemia of the brain during sleep. However, until the advent of the electroencephalograph there was no instrument or objective measuring device which would indicate the sleeping state with any degree of certainty. The characteristic changes which occur in the electroencephalograms . . . [Full Text PDF of this Article]

Author Affiliations
BOSTON

From the Department of Neuropsychiatry, Lahey Clinic.