title: [The spatial organization of bioelectrical activity during the treatment of the chronic pain syndrome].
abstract: EEG studies with spectral-coherent analysis and evoked potentials recording were carried out in 35 patients with deafferentation pain syndrome before and after pain-relief surgery (DREZ operations). In the cases with a significant anti-pain effect obtained there was an increase of the mean coherence level accompanied by an increase of different frequencies rhythms correlation in symmetrical regions of both hemispheres together with a marked decrease of intrahemispheric connections, especially in the frontal-temporal areas in the theta-range. After the pain-relief surgery the late positive component of somatosensory evoked potential (P220-300) decreased and visual evoked potentials became more clearly detected. Electrophysiological results give evidence on the alterations in the nonspecific afferent system after the pain-relief surgery and weakening of emotional tension. The data may be used as an objective criterion for evaluation of efficiency of surgical interventions in patients with pain.
authors.forename: N A
authors.initials: NA
authors.lastname: Arkhipova
authors.forename: I N
authors.initials: IN
authors.lastname: Shevelev
authors.forename: N P
authors.initials: NP
authors.lastname: Grokhovskiĭ
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000503:physiopathology*; D002908:Chronic Disease; D004569:Electroencephalography / Q000295:instrumentation / Q000379:methods; D005073:Evoked Potentials, Somatosensory / Q000502:physiology; D005074:Evoked Potentials, Visual / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000503:physiopathology* / Q000601:surgery; D011184:Postoperative Period; D012086:Reoperation; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013126:Spinal Nerve Roots / Q000601:surgery; D013577:Syndrome
vernacular_title: Prostranstvennaia organizatsiia bioélektricheskoĭ aktivnosti v protsesse lecheniia khronicheskogo bplevogo sindroma.