title: Abnormal EEG patterns in treatment-resistant schizophrenic patients.
abstract: This study was conducted in order to compare the EEG patterns of schizophrenics who do not respond to typical neuroleptics with those who do respond under typical neuroleptic medication and a group of controls. Absolute (AP) and relative power (RP), and inter- and intrahemispheric correlations were calculated. Nonresistant schizophrenics showed lower delta RP, higher alpha 1 AP and RP and higher correlation between prefrontal areas than the resistant ones and controls. Resistant schizophrenics showed lower alpha 2 RP, lower beta 1 and beta 2 in temporal but higher beta 2 AP and RP in occipital derivations, and higher intrahemispheric correlation between Fp2 and F4 and lower between F8 and T4 than the nonresistant and controls. The resistants also showed a higher antero-posterior beta 1 and beta 2 index than the controls. We concluded that the EEG pattern showed by the nonresistants may be associated with their good neuroleptic response that was not present in the resistant schizophrenics.
authors.affiliation: Instituto de Neurociencias de la Universidad de Guadalajara, Jalisco Mexico. jramos@udgserv.cencar.udg.mx
authors.forename: J
authors.initials: J
authors.lastname: Ramos
authors.forename: L F
authors.initials: LF
authors.lastname: Cerdán
authors.forename: M A
authors.initials: MA
authors.lastname: Guevara
authors.forename: C
authors.initials: C
authors.lastname: Amezcua
authors.forename: A
authors.initials: A
authors.lastname: Sanz
mesh_terms: D000328:Adult; D014150:Antipsychotic Agents / Q000627:therapeutic use*; D001921:Brain / Q000503:physiopathology*; D004351:Drug Resistance; D004569:Electroencephalography; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D012559:Schizophrenia / Q000175:diagnosis / Q000188:drug therapy* / Q000503:physiopathology*; D012720:Severity of Illness Index; D017211:Treatment Failure
chemical_list: D014150:Antipsychotic Agents