title: EEG studies on patients with chronic obsessive-compulsive neurosis before and after psychosurgery (stereotaxic bilateral anterior capsulotomy).
abstract: In 35 patients with chronic severe obsessive-compulsive neurosis the EEG was studied before, shortly after (10 days) and 1--2 years after a psychosurgical intervention (stereotaxic bilateral anterior capsulotomy). The preoperative EEG was completely normal or borderline in most of the patients (94%). After surgery EEG changes appeared in 90% of the patients. In most of them (75%) these consisted in bilaterally synchronous bursts of rhythmic slow waves with a maximum in the frontal regions. No consistent change of the alpha activity could be found. At the follow-up examinations most of the EEGs (79%) showed the same pattern as at the preoperative control. No focal or epileptiform abnormalities were observed, either at the immediate postoperative or at the follow-up examination.
mesh_terms: D000328:Adult; D003342:Corpus Striatum / Q000601:surgery*; D004569:Electroencephalography; D006801:Humans; D008875:Middle Aged; D009771:Obsessive-Compulsive Disorder / Q000175:diagnosis* / Q000601:surgery; D013238:Stereotaxic Techniques