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      Eletrencefalografia quantitativa no transtorno obsessivo-compulsivo: resultados preliminares Translated title: Quantitative electroencephalography in obsessive-compulsive disorder: preliminary results

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          Abstract

          Investigamos o valor preditivo de variáveis da eletrencefalografia quantitativa (EEGq) sobre a resposta ao tratamento farmacológico do transtorno obsessivo-compulsivo (TOC). Foram estudados 10 pacientes com TOC, segundo critérios da DSM-IV, inicialmente não medicados. As seguintes variáveis eletrencefalográficas foram selecionadas: potência relativa bipolar na faixa alfa para os eletrodos Cz-C3, Cz-C4, T3-T5, T4-T6, T3-F7 e T4-F8, potência relativa bipolar na faixa teta para os eletrodos Cz-C3, Cz-C4, T3-T5, T4-T6, T3-F7 e T4-F8 e potência relativa monopolar na faixa teta para os eletrodos Fp1, Fp2, F7, F3, Fz, F4 e F8. Dos 10 pacientes examinados, 5 apresentaram desvios estatisticamente significativos da potência relativa bipolar na faixa alfa em regiões centrais, quando comparados com o banco normativo de dados (grupo controle). Os demais não apresentaram desvios com significado estatístico. O grupo de pacientes com alterações eletrencefalográficas se caracterizou por idade de início do TOC significativamente mais precoce e pior resposta ao tratamento com inibidores da recaptação da serotonina.

          Translated abstract

          The predictive value of quantitative electroencephalography (EEGq) was investigated with regard to the pharmacological treatment of 10 non-medicated obsessive-compulsive disorder (OCD) patients diagnosed according to DSM-IV criteria. The following variables were selected: bipolar relative power in alpha band for Cz-C3, Cz-C4, T3-T5, T4-T6, T3-F7 and T4-F8; bipolar relative power in theta band for Cz-C3, Cz-C4, T3-T5, T4-T6, T3-F7 and T4-F8; and monopolar relative power in theta band for Fp1, Fp2, F7, F3, Fz, F4 and F8. There was statistically significant deviations in five patients with regard to bipolar relative power in alpha band for central regions when compared to normative data bank (control group). This group of patients had a significantly lower age of OCD onset and worse response to pharmacotherapy with serotonin reuptake inhibitors.

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          Most cited references19

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          Diagnostic and statistical manual of mental disorders.

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            EEG power modifications in obsessive-compulsive disorder during olfactory stimulation

            Temporal lobe electroencephalogram (EEG) activity was quantitatively analyzed in obsessive-compulsive disorder (OCD) when subjects are at rest and during a temporal lobe activating procedure, i.e., olfactory stimulation. At rest with eyes closed, delta-1 and alpha-2 power differences were evident in OCD patients as compared with normal controls. During olfactory stimulation, differences between patients and normal groups were detectable in the slower beta frequencies: Normal subjects showed a power increase, whereas OCD patients showed no modification or slight decrease. Our results support previous findings of temporal lobe EEG abnormalities in OCD patients with an abnormal pattern of response to a temporal lobe activating procedure.
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              Power spectral EEG analysis and EEG variability in obsessive-compulsive disorder.

              Spectral EEG characteristics of thirteen patients with severe Obsessive-Compulsive Disorder (OCD) were investigated topographically. The finding of predominantly left posterior frontal to mid-temporal theta-2 is discussed in light of previous EEG studies and recent neuroradiologic findings.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                anp
                Arquivos de Neuro-Psiquiatria
                Arq. Neuro-Psiquiatr.
                Academia Brasileira de Neurologia - ABNEURO (São Paulo )
                1678-4227
                September 2000
                : 58
                : 3A
                : 677-682
                Affiliations
                [1 ] Universidade Federal do Rio de Janeiro Brazil
                [2 ] Universidade Federal do Rio de Janeiro Brazil
                Article
                S0004-282X2000000400013
                10.1590/S0004-282X2000000400013
                84845ef6-1220-443d-b959-70ca8c43c0ba

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0004-282X&lng=en
                Categories
                NEUROSCIENCES
                PSYCHIATRY

                Neurosciences,Clinical Psychology & Psychiatry
                obsessive-compulsive disorder,quantitative electroencephalography,electrophysiology,psychopharmacotherapy,transtorno obsessivo-compulsivo,eletrencefalografia quantitativa,eletrofisiologia,psicofarmacoterapia

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