RESUMEN
OBJECTIVE: Research of electroencephalograph (EEG) power spectrum and mean frequency has shown inconsistent results in patients with schizophrenic, schizoaffective and bipolar disorders during medication when compared to normal subjects thus; the characterization of these parameters is an important task. METHODS: We applied quantitative EEG (qEEG) to investigate 38 control, 15 schizophrenic, 7 schizoaffective and 11 bipolar disorder subjects which remaine under the administration of psychotropic drugs (except control group). Absolute spectral power (ASP), mean frequency and hemispheric electrical asymmetry were measured by 19 derivation qEEG. Group mean values were compared with non parametrical Mann-Whitney test and spectral EEG maps with z-score method at p < 0.05. RESULTS: Most frequent drug treatments for schizophrenic patients were neuroleptic+antiepileptic (40% of cases) or 2 neuroleptics (33.3%). Schizoaffective patients received neuroleptic+benzodiazepine (71.4%) and for bipolar disorder patients neuroleptic+antiepileptic (81.8%). Schizophrenic (at all derivations except for Fp1, Fp2, F8 and T6) and schizoaffective (only at C3) show higher values of ASP (+57.7% and +86.1% respectively) compared to control group. ASP of bipolar disorder patients did not show differences against control group. The mean frequency was higher at Fp1 (+14.2%) and Fp2 (+17.4%) in bipolar disorder patients than control group, but no differences were found in frequencies between schizophrenic or schizoaffective patients against the control group. Majority of spectral differences were found at the left hemisphere in schizophrenic and schizoaffective but not in bipolar disorder subjects. CONCLUSION: The present report contributes to characterize quantitatively the qEEG in drug treated schizophrenic, schizoaffective or bipolar disorder patients.
RESUMEN
A 40-year-old female patient with bipolar disorder and premenstrual dysphoric disorder did not present any physical evidence of virilization, treated with quetiapine and lithium carbonate. Laboratory testing showed evidence of hyperandrogenism (Testosterone levels 88.5ng/dL). After control, testosterone levels were normal (free testosterone 0.20 pg/ml, total testosterone 27.90ng/dl), as free thyroxine levels decreased (T4 0.83ng/dl) and increased progesterone levels (progesterone 3.80ng/ml). We consider an association between increased androgenic hormone levels in women, quetiapine and lithium carbonate treatment as well as the presence of an affective disorder and premenstrual dysphoric disorder. Some relevant patents are also outlined in this review.