The American Psychiatric Association (APA) has updated its Privacy Policy and Terms of Use, including with new information specifically addressed to individuals in the European Economic Area. As described in the Privacy Policy and Terms of Use, this website utilizes cookies, including for the purpose of offering an optimal online experience and services tailored to your preferences.

Please read the entire Privacy Policy and Terms of Use. By closing this message, browsing this website, continuing the navigation, or otherwise continuing to use the APA's websites, you confirm that you understand and accept the terms of the Privacy Policy and Terms of Use, including the utilization of cookies.

×
Published Online:https://doi.org/10.1176/ajp.103.2.217

In a preliminary investigation, an impairment index scale developed by one of us (W.C.H.) for reflecting impairment of biological intelligence has been applied to 8 carefully selected individuals before and after prefrontal lobotomy and to another individual following lobotomy. Several of these cases were found to exhibit an impairment of biological intelligence prior to lobotomy. This operation did not consistently alter the degree of impairment manifested quantitatively in contrast with high impairment scores obtained for frontal lobectomies. This would seem to point to the cortex of the frontal lobes as the region of the brain in which the functions reflected by the impairment index are maximally represented or localized.

It is concluded that:

1. Impaired biological intelligence, as encountered in some forms of psychopathy, is not relieved by the operation known as prefrontal lobotomy.

2. Lobotomy may not increase the degree of impairment of this function. [See Fig. 2 In Source Pdf].

3. Little is known concerning the behavioral effects of prefrontal lobotomy.

Access content

To read the fulltext, please use one of the options below to sign in or purchase access.