Sources:
Solyom L, Turnbull IM, Wilensky M. "A case of self-inflicted leucotomy." British Journal of Psychiatry, 1987 (the "George" case).
Goodman WK et al. "Harmonizing the Neurobiology and Treatment of OCD." American Journal of Psychiatry, 2021 (cingulotomy and capsulotomy targets and response rates).
Saxena S et al. CSTC circuit model of OCD, 1998 (orbitofrontal to caudate to thalamus loop).