#psychosurgery  brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems
  supertype:  brain_surgery__brainsurgery  any surgical procedure involving the brain
  subtype:  amygdalotomy  psychosurgery in which amygdaloid fibers that mediate limbic system activity are severed (in cases of extreme uncontrollable violence)
  subtype:  callosotomy  severing the corpus callosum so that communication between the cerebral hemispheres is interrupted (in cases of severe intractable epilepsy)
  subtype:  prefrontal_lobotomy__lobotomy__leukotomy__leucotomy__prefrontalleukotomy__prefrontal_leucotomy  surgical interruption of nerve tracts to and from the frontal lobe of the brain; often results in marked cognitive and personality changes
     subtype:  transorbital_lobotomy  a method of performing prefrontal lobotomy in which the surgical knife is inserted above the eyeball and moved to cut brain fibers

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