ELECTROENCEPHALOGRAPHY

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Abstract
As there has never been a reliable objective test for blindness, a physician suspecting hysterical blindness or malingering may be unable to confirm his diagnosis. Conversely, the physician may feel confident that a patient is not a malingerer and yet be unable to prove genuine blindness. It was just such a situation that led to this study (case 1). The value of a reliable objective test for blindness, especially in compensation cases and in military medicine, is obvious. Electroencephalography is a method of recording the electrical activity of the brain, roughly analogous to the use of electrocardiography in studying the activity of the heart. The most prominent brain waves are the alpha waves with an approximate rhythm of 8 per second. These waves appear only with the eyes shut, as they arise almost entirely from the visual cortex and are broken up when the eyes are open and the subject

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