Following this exposition I do not wish to make any comment since the facts speak for themselves. These were hospital patients who were well studied and well followed. The recoveries have been maintained. I cannot believe that the recoveries can be explained upon simple coincidence. Prefrontal leucotomy is a simple operation, always safe, which may prove to be an effective surgical treatment in certain cases of mental disorder.
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Egas Moniz (1937) studied this question.