ABSTRACT Background: Patients with Bipolar Disorder (BD) have the highest lifetime risk for suicidal behavior (SB) compared to other psychiatric disorders. Neuroimaging research provides evidence of some structural and functional abnormalities in the brain of BD suicide attempters (SA), but interpretation of these findings may represent a number of features. Objective: The purpose of this study was to evaluate the volume of the prefrontal cortex in euthymic BD type I outpatients, with and without history of SA. Methods: 36 euthymic BD I outpatients (18 with and 18 without suicide attempt history) were underwent structural MRI and total and regional gray matter volumes were assessed and compared with 22 healthy controls (HC). Results: We did not found any differences in all areas between suicidal and non-suicidal BD I patients and BD patients as a group compared to HC as well. Discussion: our findings suggest that can be a different subgroups of patients in relation to prefrontal cortex volumes according to some clinical and socio-demographic caractheristics, such as number of previous episodes and continuous use of medical psychotropic drugs that may induce neuroplasticity phenomena, which restore cerebral volume and possibly can lead to long-term euthymia state.

Objective: Functional neuroimaging techniques represent fundamental tools in the context of translational research integrating neurobiology, psychopathology, neuropsychology, and therapeutics. In addition, cognitive-behavioral therapy (CBT) has proven its efficacy in the treatment of anxiety disorders and may be useful in phobias. The literature has shown that feelings and behaviors are mediated by specific brain circuits, and changes in patterns of interaction should be associated with cerebral alterations. Based on these concepts, a systematic review was conducted aiming to evaluate the impact of CBT on phobic disorders measured by functional neuroimaging techniques. Methods: A systematic review of the literature was conducted including studies published between January 1980 and April 2012. Studies written in English, Spanish or Portuguese evaluating changes in the pattern of functional neuroimaging before and after CBT in patients with phobic disorders were included. Results: The initial search strategy retrieved 45 studies. Six of these studies met all inclusion criteria. Significant deactivations in the amygdala, insula, thalamus and hippocampus, as well as activation of the medial orbitofrontal cortex, were observed after CBT in phobic patients when compared with controls. Conclusion: In spite of their technical limitations, neuroimaging techniques provide neurobiological support for the efficacy of CBT in the treatment of phobic disorders. Further studies are needed to confirm this conclusion.

CONTEXTO: Pacientes com transtorno bipolar possuem risco maior de suicídio, quando comparados com a população geral e com outros transtornos psiquiátricos. Este artigo tem como objetivo revisar os aspectos sociodemográficos, clínicos e neuroanatômicos associados ao comportamento suicida em pacientes com transtorno bipolar com história de tentativa de suicídio. MÉTODOS: Revisão não sistemática da literatura, por meio dos indexadores eletrônicos: PsycoInfo, Lilacs,Medline e PubMed, utilizando-se as palavras-chave: "attempt suicide", "suicidal behavior", "suicide", "bipolar disorder", "suicide risk factor", "neuroimaging" e "suicide neurobiology". RESULTADOS: Diversas características sociodemográficas e clínicas têm sido associadas às tentativas de suicídio em pacientes bipolares, porém os resultados são ainda conflitantes. Em relação aos achados de neuroimagem, os dados também são escassos e inconsistentes. Destes, a hiperintensidade periventricular em substância branca e as alterações na estrutura e função do córtex pré-frontal são os mais descritos. CONCLUSÕES: Considerando que o suicídio é uma causa potencialmente evitável de morte, a compreensão dos correlatos clínicos e neurobiológicos do comportamento suicida pode ser útil na prevenção desse comportamento. Sendo assim, estudos que avaliem melhor os fatores de risco para o comportamento suicida nessa população são necessários.

BACKGROUND: Bipolar patients have a higher risk of suicide when compared with the general population and other psychiatric disorders. The aim of this article is to review the social-demographic, clinical and neuroanatomical aspects of suicidal behavior in bipolar patients. METHODS A non-systematic review of literature through PsycoInfo, Lilacs, Medline and PubMed eletronic databases was conducted, using the keywords: "suicide attempt", "suicidal behavior", "suicide" "bipolar disorder", "suicide risk factor," "neuroimaging", and "suicide neurobiology." RESULTS: Several clinical and sociodemographics characteristics have been associated with suicide attempts in bipolar patients, but results are conflicting. Regarding to neuroimaging, the data are rare, and the results are inconsistent, with reports of white matter hyperintensities and changes in structure and function of the prefrontal cortex. DISCUSSION: Given that suicide is a potentially preventable cause of death, the understanding of neurobiological and clinical correlates of suicidal behavior can be useful in reducing rates of attempt suicide in bipolar patients.

RESUMO Novas evidências sugerem que o cerebelo apresenta alterações estruturais e funcionais nos transtornos psiquiátricos. Objetivo: Medir o volume do cerebelo e de suas sub-regiões em indivíduos portadores de transtornos psiquiátricos e relacionar tais achados aos sintomas. Métodos: Foi realizada a identificação de pacientes com diferentes graus de prejuízo cognitivo proveniente de um estudo populacional (Epidemiologia do Idoso - UNIFESP), pacientes com transtorno do estresse pós-traumático proveniente de outro estudo populacional e portadores de transtorno bipolar proveniente de um ambulatório especializado (Universidade Federal da Bahia). Todos os sujeitos foram submetidos à ressonância magnética estrutural de 1.5T. As medidas de volume, assim como os sintomas medidos por escalas psicométricas foram comparadas entre pacientes e controles. Resultados: Foi observado que o volume do cerebelo está reduzido nos portadores de prejuízo cognitivo sem demência e com demência, no transtorno do estresse pós-traumático e no transtorno bipolar quando comparados aos controles. Na demência e no transtorno do estresse pós-traumático o volume do hemisfério cerebelar esquerdo e do vérmis estão reduzidos. No transtorno bipolar os volumes de ambos os hemisférios e do vérmis estão reduzidos. Nos dois primeiros estudos estas reduções correlacionaram com os sintomas. Conclusão: A natureza exata do envolvimento do cerebelo nos processos mentais ainda não é compreendida. Entretanto, anormalidades na estrutura cerebelar e em suas funções têm sido relatadas em algumas dessas doenças. Pesquisas futuras, com amostras maiores, ainda são necessárias para esclarecer tais achados e investigar se são importantes para o tratamento e prognóstico.

ABSTRACT. New evidence suggests that the cerebellum has structural and functional abnormalities in psychiatric disorders. Objective: In this research, the goal was to measure the volume of the cerebellum and its subregions in individuals with psychiatric disorders and to relate these findings to their symptoms. Methods: Patients with different degrees of cognitive impairment (Epidemiology of the Elderly - UNIFESP) and patients with post-traumatic stress disorder (PTSD) from population studies were analyzed. Also, patients with bipolar disorder from an outpatient clinic (Center for the Study of Mood and Anxiety Disorders, Universidade Federal da Bahia) were recruited for this study. All subjects underwent a 1.5T structural magnetic resonance scan. Volumetric measures and symptom measurements, by psychometric scales, were performed and compared between patients and controls. Results: The cerebellum volume was reduced in patients with cognitive impairment without dementia and with dementia, in patients with PTSD, and in patients with bipolar disorder compared to controls. In dementia and PTSD, the left cerebellar hemisphere and vermis volume were reduced. In bipolar disorder, volumes of both hemispheres and the vermis were reduced. In the first two studies, these cerebellar volumetric reductions correlated with symptoms of the disease. Conclusion: The exact nature of cerebellar involvement in mental processes is still not fully understood. However, abnormalities in cerebellar structure and its functions have been reported in some of these diseases. Future studies with larger samples are needed to clarify these findings and investigate whether they are important for treatment and prognosis.

OBJETIVO: Estudar a influência dos transtornos alimentares (TA) na gravidade do transtorno bipolar (TB). MÉTODOS: Foram utilizadas a Entrevista Clínica Estruturada para o Eixo I do DSM-IV (SCID-I), a Escala de Young para Avaliação da Mania (YMRS), a Escala de Hamilton para Avaliação da Depressão (HAM-D-17), a Escala de Hamilton para Avaliação da Ansiedade (HAM-A), a Avaliação do Funcionamento Global (GAF) e a Escala Breve de Avaliação da Qualidade de Vida da Organização Mundial da Saúde (WHOQOL-BREF). Os dados clínicos e sociodemográficos também foram coletados. RESULTADOS: Entre os 355 pacientes com TB incluídos neste estudo, 19 (5,3%) também foram diagnosticados como portadores de TA. Destes, 57,9% tinham bulimia nervosa (BN) e 42,1% anorexia nervosa (AN). Dentre os pacientes com TA, 94,7% eram do gênero feminino. Os pacientes portadores de TB e TA apresentaram escores mais baixos do domínio saúde mental da WHOQOL-BREF, escores mais elevados de sintomas depressivos e mais comorbidades psiquiátricas. CONCLUSÕES: A presença de comorbidades com TA acarreta importantes desfechos negativos em pacientes bipolares. Este achado sugere que atenção deva ser dada à presença de TA em pacientes com TB e que melhores tratamentos focados nessa população sejam desenvolvidos.

OBJECTIVES: To study the impact of eating disorders (EDs) on the severity of bipolar disorder (BD). METHODS: The Structured Clinical Interview for DSM-IV Axis I (SCID-I), Young Mania Rating Scale (YMRS), Hamilton Depression Rating Scale (HAM-D-17), Hamilton Anxiety Rating Scale (HAM-A), Global Assessment of Functioning (GAF), Clinical Global Impression (CGI), and the World Health Organization Quality of Life Assessment (WHOQOL-BREF) were used. Clinical and sociodemographic data were also collected. RESULTS: Among the 356 bipolar patients included in this study, 19 (5.3%) were also diagnosed with ED. Of these, 57.9% had bulimia nervosa (BN) and 42.1% had anorexia nervosa (AN). Among ED patients, 94.7% were female. Bipolar patients with EDs presented with lower scores in the mental health domain of the WHOQOL-BREF, higher scores of depressive symptoms, and more psychiatric comorbidities. CONCLUSIONS: ED comorbidities imposed important negative outcomes in bipolar patients. This finding suggests that attention should be given to the presence of EDs in BD patients and that better treatments focused on this population should be developed.