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Electroencephalographic changes as prognostic indicators after psychosurgery
  1. Bidi M Evans*,
  2. P K Bridges,
  3. J R Bartlett
  1. *Department of Clinical Neurophysiology, Brook General Hospital, London
  2. The Geoffrey Knight Psychosurgical Unit,† Brook General Hospital, London


    Thirty-five patients were studied by EEG with recordings taken the day before, two weeks after, and six months after psychosurgery. Most showed a characteristic frontal slow activity of varying degrees after operation with varying enhancement of background activity. The amount and spread of the frontal slow waves two weeks after operation showed a significant positive correlation with the clinical outcome one year later, which suggests a relatively objective and very early indication of the subsequent clinical response to psychosurgery.

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