O Transtorno Obsessivo-Compulsivo (TOC) consiste em uma doença crônica caracterizada pela presença de obsessões e/ou compulsões. Em geral, cerca de 20% são pacientes considerados refratários por não responder a múltiplas intervenções de tratamento de primeira linha. Para esses pacientes, os tratamentos cirúrgicos são opções a serem consideradas. Dentre esses, destaca-se a capsulotomia ventral anterior por raios gama (radiocirurgia Gamma-Knife). Estudos clínicos e neuropsicológicos com a radiocirurgia Gamma-Knife em pacientes com TOC demonstraram eficácia e segurança desse procedimento. No entanto, não foram encontrados na literatura estudos de personalidade com esse tratamento no TOC. Portanto, o objetivo deste estudo foi investigar mudanças de personalidade após um ano da capsulotomia ventral anterior por raios gama em pacientes com TOC refratário. A avaliação da personalidade foi feita através do Inventário de Personalidade NEO revisado (NEO PI-R) e do Inventário de Temperamento e Caráter de Cloninger (TCI) em quatorze pacientes com TOC refratário antes e após um ano da radiocirurgia Gamma-Knife. Comparações dos dados de personalidade entre pacientes respondedores (n=5) ao tratamento e não respondedores (n=9) e análises de regressão com método stepwise bidirecional de seleção de variáveis foram realizadas. Como resultado principal, não foi encontrada piora de personalidade após a radiocirurgia. Ao contrário, encontrou-se uma tendência de diminuição dos escores de Neuroticismo e Persistência e, em geral, os dados dos pacientes se aproximaram dos dados dos controles. No que diz respeito aos respondedores, houve uma diminuição nos escores da dimensão de Neuroticismo e um aumento da dimensão de Extroversão significativos após um ano de tratamento, enquanto que os pacientes não respondedores não tiveram mudanças em quesito de personalidade. Predição de percentual de redução dos escores de YBOCS foi encontrada para as escalas de TCI, tendo contribuição do percentual de mudança das dimensões de Busca de novidades, Persistência, Autodirecionamento e Cooperatividade foram significantes em predizer o percentual de mudança de YBOCS. Busca de novidades, Dependência de Gratificação, Autodirecionamento e Cooperatividade foram significantes em predizer o percentual de mudança de funcionamento global. Essa melhora no funcionamento global depois da radiocirurgia nos pacientes com TOC pode estar relacionada ao aumento de motivação para começar e completar tarefas, perseguir objetivos e engajar-se com terceiros. Contudo, conclui-se que o procedimento de capsulotomia ventral anterior por raios gama para o tratamento de TOC não é somente seguro em termos de mudanças de personalidade, mas também pode melhorar algumas de suas dimensões / Obsessive-Compulsive Disorder (OCD) is a chronic disease characterized by the presence of obsessions and/or compulsions. In general, about 20% of OCD patients are considered refractory for not responding to multiple first-line treatment interventions. Performing surgical procedures such as gamma ventral capsulotomy (GVC) is an option to be considered for the treatment of refractory OCD patients. Clinical and neuropsychological studies with GVC in OCD patients have demonstrated the efficacy and safety oh this procedure efficacy and safety. However, personality studies with this treatment in OCD are not found in literature. The objective of this study was to investigate personality changes after one year of GVC in refractory OCD patients. Personality assessment was performed using the Revised NEO Personality Inventory (NEO PI-R) and the Cloninger\'s Temperament and Character Inventory (TCI) in fourteen refractory OCD patients before and one year after GVC. Personality data comparisons between treatment responders (n = 5) and non-responders (n = 9), and also linear regressions using a stepwise bidirectional elimination approach for variables selection were performed. As the main result, no impairment in personality was found after GVC. On the contrary, there was a decrease tendency in Neuroticism and Persistence scores and in general, patients\' data approached to controls\'. Patients responders presented a reduction in Neuroticism scores and an increase in Extraversion scores, whereas non-responders did not change personality. Persistence, Selfdirectedness and Cooperativeness were significant in predicting percentage of change in YBOCS scores. Novelty Seeking, Reward Dependence, Selfdirectedness and Cooperativeness were significant in predicting the percentage of improvement in global functioning. This improvement in global functioning after GVC could be thought of as relating to better motivation to begin tasks, pursue goals, complete tasks, and engage with others. In conclusion, GVC procedure for OCD treatment is not only safe in terms of personality changes, but it can also improve some of its dimensions

Dans la maladie de Parkinson (MP), la perte progressive des neurones dopaminergiques (DA) touche principalement la substantia nigra pars compacta (SNc). Les symptômes moteurs sont classiquement gérés par une thérapie dopaminergique de remplacement (TDR). Conjointement à la levodopa, l’utilisation d’agonistes dopaminergiques permet de prévenir les complications motrices mais peut être associée à des troubles du système de récompense. Jusqu’à 14% des patients parkinsoniens sous TRD peuvent souffrir de comportement « addiction-like » tels que le pari pathologique, l’hypersexualité ou une prise compulsive de la médication DA. A ce jour la seule solution thérapeutique consiste à diminuer la TRD ce qui détériore les symptômes moteurs. Les neuroadaptations conduisant à ces troubles du système de récompense demeurent mal comprises. Nous proposons un travail dans lequel nous avons évalué les propriétés appétitives de l’agoniste D2/D3 pramipexole (ppx) après une exposition chronique à la L-dopa dans un modèle de rat parkinsonien alpha-synucléine. Dans une première étude, nous avons évalué l’effet d’une stimulation répétée des récepteurs DA sur la sensibilisation du système de récompense en contexte parkinsonien. Nos résultats montrent un effet récompensant du ppx après administrations chronique de L-dopa et perte DA nigrostriatal induite par surexpression de l’alpha-synucléine. Aucune modification transcriptionnelle n’a été observée pour les récepteurs DA. Cependant, nous avons identifié une association entre lésion/traitement pharmacologique et des changements transcriptionnels potentiellement liés à un contexte d’addiction aux psychostimulants. Cette étude fournit des preuves suggérant fortement la lésion parkinsonienne et la thérapie L-dopa comme des facteurs conjointement impliqués dans le remodelage cérébral sous-tendant une préférence de place conditionnée pour le ppx. Les données moléculaires et pharmacologiques générées ont suggéré un rôle clé de la voie glutamatergique dans cette réponse comportementale. Ce résultat est cohérent avec la littérature décrivant un déséquilibre glutamatergique striatal dans les contextes d’addiction aux psychostimulants et de complications motrices associées à la MP. Ainsi, nous avons conçu une deuxième étude visant à investiguer plus avant le potentiel thérapeutique d’une inhibition des récepteurs glutamatergiques. Une lésion bilatérale de la SNc a été réalisée par surexpression de la protéine alpha-synucléine au moyen d’un vecteur AAV. Suite à cette lésion, un traitement chronique à la L-dopa a été réalisé. L’effet de l’antagoniste des récepteurs mGluR5 (metabotropic glutamate receptor 5) MPEP sur les propriétés renforçatrices du ppx a été évalué dans un paradigme de préférence de place conditionnée. Enfin, une analyse des changements d’expression de protéines d’intérêt a été réalisé afin d’associer changements comportementaux drogue/lésion induits et paramètres moléculaires. L’acquisition et l’expression de la préférence de place ppx-induite a été abolie par le MPEP. De plus, nous avons identifié des réseaux neuraux et des modifications d’expression protéiques sous-tendant les plasticités striatales associées à la réponse comportementale. L’ensemble de ces travaux apporte de nouvelles idées sur le contexte physiopathologique associé aux troubles du système de récompense dans la MP. Des données moléculaires et pharmacologiques convergentes suggèrent fortement le mGluR5 comme une cible thérapeutique prometteuse. / In Parkinson’s Disease (PD), the progressive dopaminergic (DA) cell loss mainly affects the substantia nigra pars compacta (SNc). The motor symptoms are classically managed by DA replacement therapies (DRT). Although adding DA agonists to levodopa treatment may contribute to prevent motor complications, it may be associated with drug‑induced changes in reward related pathways. Up to 14% of PD patients under DRT may suffer from ‘addiction‑like’ behavior such as pathological gambling, hypersexuality or DA medication‑induced substance abuse. To date, the only therapeutic answer consists in lowering the DA medications which deteriorates the motor symptoms. Neuroadaptations leading to reward bias in PD patients under DRT are still poorly understood. To address this challenge, we propose a work in which we have assessed the rewarding effect of the D2/D3 agonist pramipexole (ppx) after chronic exposure to L‑dopa in an alpha-synuclein PD rat model. In a first study, we assessed the effect of repeated DA receptors stimulations on sensitization of the reward system in a parkinsonian context. Our findings demonstrated that ppx had a rewarding effect after chronic L-dopa administrations and alpha-synuclein-mediated nigral loss. No transcriptional changes within DA receptors were highlighted. However, we identified an association between the main drug or lesion and transcriptional changes which were potentially related to the context of psychostimulant addiction. This study provides evidences strongly suggesting that PD-like lesion and L-dopa therapy were concomitant factors involved in striatal remodeling underlying the ppx-induced place preference. Molecular and pharmacological data suggested a key involvement ofthe glutamatergic pathway in this behavioral outcome. These data were consistent with literature describing major striatal glutamate imbalance as a common feature of drug addiction and Parkinson’s disease physiopathological contexts. Hence, we designed a second study aiming to further investigate the therapeutic potential of glutamatergic receptors inhibition. A bilateral lesion of the SNc was performed in the rat using AAV-mediated overexpression of the alpha-synuclein. This lesion was followed by chronic L-dopa administrations. Then, the effect of the metabotropic glutamate receptor 5 (mGluR5) antagonist MPEP on ppx reinforcing properties was assessed in a place conditioning paradigm. Finally, analysis at the protein level was conducted to associate drug and lesion induced behavioral changes to molecular endpoints. Acquisition and expression of the ppx-induced place preference was abolished by the MPEP. Furthermore, we identified neural networks and protein changes underlying the striatal remodeling associated with the behavioral outcome. All this work provides new insights into the physiopathological context associated to the PD/DRT related reward bias. Convergent molecular and pharmacological data strongly suggest mGluR5 as a promising therapeutic target.

Doctor of Clinical Psychology / Obsessive-compulsive (OC) symptoms occur in a variety of clinical conditions, but the underlying pathogenesis of these symptoms remains elusive. Few neuropsychological investigations have compared idiopathic Obsessive-Compulsive Disorder (OCD) with patient groups where OC symptoms are acquired. The present study investigated the neuropsychological correlates of OC symptoms in OCD and frontotemporal dementia (FTD), a neurodegenerative illness in which OC symptoms are often acquired. Neuroimaging in OCD has consistently implicated the frontal-striatal-thalamic circuit, particularly the orbitofrontal cortex and basal ganglia. These areas overlap considerably with the sites of cerebral pathology found in FTD. OCD has been associated with a number of neuropsychological deficits, with most consistent findings pointing towards impaired executive function (EF), and less commonly reported deficits in visual memory and visuospatial ability. The neuropsychological hallmark of FTD is deficits in EF. However in both OCD and FTD, the relationship between cognitive deficits and OC symptoms remains unclear. Further, the extent to which OC symptoms are comparable between the groups is ambiguous. Part I of the present study compared 19 OCD subjects to 20 age, education and IQ-matched healthy controls on a battery of neuropsychological tests of all major cognitive domains with emphasis on EF. A measure of Theory of Mind (ToM) thought to be sensitive to orbitofrontal function was also administered. OCD subjects performed worse than controls on a measure of visual memory, visuospatial reasoning and on only one measure of EF. OCD symptom subtypes, as measured by the Obsessive-Compulsive Inventory (OCI), were not correlated with any cognitive deficits. No group differences in ToM were found. It is suggested that prior research has overestimated the severity and significance of EF deficits in OCD. Part II of the study compared 9 FTD participants with 10 matched healthy controls on the same neuropsychological test battery and OC symptom measures. In addition, a measure of compulsive behaviours used in neurological populations was administered to carers. While the incidence of OC symptoms was comparable to reports in previous studies (78%), the OCI was not sensitive in the detection of OC symptoms in FTD. The similarities and differences in OC symptoms between the two patient groups are discussed.

Obsessive-compulsive disorder (OCD) and the spectrum of associated conditions, affect 2-4% of the population worldwide. Although heritability studies in OCD have shown a 3 - 12 times increased risk for first degree relatives, the identification of the underlying risk-conferring genetic variation using classic genetic association studies has proven to be difficult. The possibility of a larger contribution of rare genetic variants to the risk of psychiatric disorder has been suggested by several successful studies. We expect that a spectrum of risk allele frequencies exists, which includes not only common variation but also a substantial amount of rare genetic variants that contribute to OCD. This thesis is aimed at identifying and functionally characterizing rare genetic variation in the OCD spectrum. Identified statistically significant variants were scrutinized for changes related to synaptic function using high content screening and subsequent functional analyses. Identifying the genetic profile of rare variants found in the OCD spectrum cohort combined with the functional impact that these variants have has provided insight into the etiology of the OCD spectrum. With these approaches a foundation can be laid for the development of a predictive model of the OCD spectrum.

No description available.

L’approche cognitive du trouble obsessionnel-compulsif (TOC) propose un lien bidirectionnel entre les émotions et les cognitions. Cependant, même si des études montrent une association entre les émotions et le TOC, aucune étude ne s’est attardée à la relation entre les émotions, les cognitions et les comportements au cours d’une thérapie cognitive. La présente étude a pour but d’examiner la relation entre les processus cognitif, béhavioral et émotionnel au cours d’une thérapie basée sur les inférences (TBI) chez des personnes souffrant du TOC. Plus précisément, nous avons observé comment les émotions et les symptômes du TOC s’influencent et comment ils s’influencent à travers le temps. Les patients ont rempli un journal de bord tout au long du processus thérapeutique, notant (de 0 à 100) des émotions clés, ainsi que les croyances et les comportements ciblés durant la thérapie. Des analyses à mesures répétées ont été utilisées afin de maximiser le potentiel des données longitudinales. Les résultats montrent que l’anxiété, la tristesse et la joie ont des trajectoires similaires aux croyances et aux comportements au cours de la thérapie. Les forces et limites de l’étude sont discutées. Les implications des résultats pour le traitement des émotions et des pensées à différents moments de la thérapie sont aussi discutées. / Cognitive approach of obsessive-compulsive disorder (OCD) has suggested a bidirectional link between emotions and cognitions. Few studies have looked at a link between those two components. Although some studies tend to show a relationship between emotions and OCD, no study has looked into the relationship between emotions, cognitions and behaviours over the course of a cognitive therapy. The present case series examines the relationship between cognitive, behavioural and emotional processes over the course of an inference-based therapy (IBT) in OCD clients. More precisely, we looked at how emotions and OCD symptoms influence each other and how they influence each other over time (through therapy). Clients filled in daily diaries rating key emotions, behaviours and beliefs over the course of treatment. A longitudinal analysis based on an event-based approach was used to maximize the potential of longitudinal data. Results showed that anxiety, sadness and joy share similar trajectories with beliefs and behaviours over the course of therapy. Strengths and limitations of the study are noted. Implications for targeting emotions and thoughts at different stages of therapy are also discussed.

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Doctor of Clinical Psychology / Obsessive-compulsive (OC) symptoms occur in a variety of clinical conditions, but the underlying pathogenesis of these symptoms remains elusive. Few neuropsychological investigations have compared idiopathic Obsessive-Compulsive Disorder (OCD) with patient groups where OC symptoms are acquired. The present study investigated the neuropsychological correlates of OC symptoms in OCD and frontotemporal dementia (FTD), a neurodegenerative illness in which OC symptoms are often acquired. Neuroimaging in OCD has consistently implicated the frontal-striatal-thalamic circuit, particularly the orbitofrontal cortex and basal ganglia. These areas overlap considerably with the sites of cerebral pathology found in FTD. OCD has been associated with a number of neuropsychological deficits, with most consistent findings pointing towards impaired executive function (EF), and less commonly reported deficits in visual memory and visuospatial ability. The neuropsychological hallmark of FTD is deficits in EF. However in both OCD and FTD, the relationship between cognitive deficits and OC symptoms remains unclear. Further, the extent to which OC symptoms are comparable between the groups is ambiguous. Part I of the present study compared 19 OCD subjects to 20 age, education and IQ-matched healthy controls on a battery of neuropsychological tests of all major cognitive domains with emphasis on EF. A measure of Theory of Mind (ToM) thought to be sensitive to orbitofrontal function was also administered. OCD subjects performed worse than controls on a measure of visual memory, visuospatial reasoning and on only one measure of EF. OCD symptom subtypes, as measured by the Obsessive-Compulsive Inventory (OCI), were not correlated with any cognitive deficits. No group differences in ToM were found. It is suggested that prior research has overestimated the severity and significance of EF deficits in OCD. Part II of the study compared 9 FTD participants with 10 matched healthy controls on the same neuropsychological test battery and OC symptom measures. In addition, a measure of compulsive behaviours used in neurological populations was administered to carers. While the incidence of OC symptoms was comparable to reports in previous studies (78%), the OCI was not sensitive in the detection of OC symptoms in FTD. The similarities and differences in OC symptoms between the two patient groups are discussed.

O transtorno obsessivo-compulsivo (TOC) possui freqüentemente curso crônico, incapacitando cerca de 10% dos seus portadores. Os sintomas interferem de forma acentuada na vida do paciente, alterando suas rotinas e causando incompreensão dos familiares e daqueles que convivem com ele. A terapia cognitivo-comportamental em grupo (TCCG) é um tratamento eficaz, reduzindo os sintomas do TOC em mais de 70% dos portadores, sendo que ao redor de 27% obtêm remissão completa dos sintomas. Entretanto, cerca de 30% não obtêm nenhuma melhora. Conhecer as razões pelas quais esses pacientes não melhoram e identificar os fatores preditores associados ao aproveitamento ou não da terapia poderia auxiliar em uma melhor compreensão do TOC, numa melhor indicação do tratamento e no desenvolvimento de estratégias que incrementem sua eficácia. O presente estudo foi realizado com 181 pacientes com TOC, que cumpriram um programa de TCCG de 12 sessões semanais de 2 horas, entre outubro de 1999 e dezembro de 2006, no Programa de Transtornos de Ansiedade (PROTAN) do Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS) e tinha como objetivo verificar, em pacientes portadores de TOC, a existência de fatores preditores da resposta à TCCG.Os pacientes foram avaliados antes, durante e ao final do tratamento com os seguintes instrumentos: Y-BOCS, Y-BOCS chek-list, CGI, WHOQOL-BREF. Foi utilizada uma entrevista clínica estruturada com a finalidade de colher dados sobre os sintomas do paciente, histórico da doença, tratamentos anteriores e estabelecimento do diagnóstico do TOC de acordo com o DSM-IV-TR. Também foram coletados dados demográficos, socioeconômicos, status ocupacional, uso de medicação e critérios deinclusão na pesquisa. A entrevista foi complementada pelo MINI (International Neuropsychiatric Interview) para verificar a presença de comorbidades. Considerou-se como “resposta” a redução no mínimo de 35% nos escores da Y-BOCS e uma pontuação na CGI “normal” ou “limítrofe para doença” do pós para o pré-tratamento. O estudo pretende verificar se as seguintes variáveis: sexo, idade do paciente no início do tratamento, tempo de duração da doença, idade de início da doença, situação conjugal, nível de instrução, situação ocupacional, tipo de início da doença, curso, intensidade dos sintomas do TOC no início do tratamento, juízo crítico, história familiar, tipos de sintomas, uso de medicação específica para o TOC concomitante à TCCG estão associadas ou não com a resposta ao tratamento. Para avaliar a associação entre as variáveis categóricas à resposta ao tratamento, foi utilizado o teste qui-quadrado de Pearson. Nas variáveis dicotômicas foi aplicada a correção de Yates. Para avaliar as variáveis quantitativas em relação às categorias de resposta ao tratamento, foi utilizado o teste t de Student para amostras independentes. As variáveis que obtiveram um nível descritivo amostral (valor p) menor do que 0,25 foram inseridas no modelo de regressão logística múltipla.Fatores associados com uma melhor resposta à TCCG: sexo feminino (p=0,074); melhor juízo crítico acerca dos sintomas da doença (p=0,017); melhor qualidade de vida antes do início do tratamento: domínio físico (p=0,039), domínio psicológico (p<0,001), domínio ambiental (p=0,038), domínio social (p=0,053). Fatores associados com piores resultados: maior gravidade global da doença no início do tratamento, avaliada pela CGI (p=0,007); maior número de comorbidades associadas ao TOC (p=0,063); presença de fobia social (p=0,044) e distimia (p=0,072); presença de compulsão de repetição (p=0,104).Numa segunda etapa da análise estatística, incluiu-se no modelo todas as variáveis que na primeira fase haviam apresentado associação com os resultados. As variáveis que na análise de regressão logística múltipla permaneceram associadas significativamente foram: sexo feminino (ORAjustado=2,58; p=0,021); domínio psicológico da WHOQOLBREF (ORAjustado=1,05; p=0,011); juízo crítico (ORAjustado=2,67; p=0,042) e CGI-gravidade antes do inicio da terapia (ORAjustado=0,62; p=0,045). Embora alguns fatores relacionados com a resposta ao tratamento tenham sido identificados, poder prever quais os pacientes irão aproveitar a terapia e quais não irão se beneficiar é uma questão em aberto e está longe de ser esclarecida. As razões para essas dificuldades podem estar relacionadas à heterogeneidade do TOC e das amostras utilizadas nos diferentes estudos, além da falta de padronização das técnicas psicoterápicas utilizadas. Por fim, é possível que fatores não-específicos relacionados com a pessoa do terapeuta, com a qualidade da relação terapêutica, além da motivação e capacidade de tolerar frustração por parte do paciente possam exercer um papel importante que não tem sido avaliado pelas pesquisas. / Obsessive-compulsive disorder (OCD) frequently is a chronic disorder that incapacitates about 10% of patients. Symptoms severety affect the life of patients, change their routines and cause misunderstandings with family and all those that have contact with the patient. Group cognitive-behavioral therapy (GCBT) in 12 two-hour weekly sessions is an efficient treatment that reduces OCD symptoms in over 70% of the patients and results in complete remission of symptoms in 27%. However, about 30% of the patients do not show any improvement. The knowledge of reasons why these patients do not improve and the identification of factors associated with these different therapy outcomes may help to understand OCD better, and may inform treatment indications and the development of strategies to increase its efficacy. This study included 181 patients with OCD treated with 12 session of GCBT from October 1991 to December 2006 at the Anxiety Disorders Program (Programa dos Transtornos de Ansiedade – PROTAN) of Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil. The purpose of this study was to investigate predictors of response to GCBT.The following instruments were used to evaluate patients before and at the end of the treatment: Y-BOCS, Y-BOCS checklist, CGI, WHOQOL-BREF. Evaluation was conducted by means of a structured clinical interview to collect data about the patient’s symptoms, disease history, previous treatments, and OCD diagnosis according to DSM-IVTR (APA, 2002). Demographic and socioeconomic data, occupational status, use of medication and criteria for inclusion in the study were also recorded. The interview wascomplemented with the MINI (International Neuropsychiatric Interview) to investigate comorbidities. Response criteria were: >35% reduction in Y-BOCS scores and normal or borderline CGI scores at post-treatment evaluation. The study investigated the possible association of the following variables with response to treatment: sex, age at beginning of treatment, disease duration, age at onset, marital status, education, occupation, type of disease onset, disease course, intensity of OCD symptoms at beginning of treatment, insight, family history, types of symptoms, and use of antiobsessional medications during GCBT. The Pearson chi-square test was used to evaluate the association between categorical variables and response to treatment. Yates correction was performed for dichotomous variables. The Student t test for independent samples was used to evaluate quantitative variables in relation to categories of response to treatment. Variables that achieved a p value lower than 0.25 were included in the initial logistic regression model, which evaluated the predictors of response to treatment and also controlled for possible confounding variables. The following factors showed associations with response to GCBT: women had greater odds of responding to treatment (p=0.074); better insight into disease symptoms was associated with better results (p=0.017); better quality of life before the beginning of treatment was also associated with better results (physical domain: p=0.039; psychological domain: p<0.001; environmental domain: p=0.038; social domain: p=0.053); patients with greater global severity of disease according to CGI had worse results (p=0.007); a greater number of associated comorbidities (p=0.063), social phobia (p=0.044) and dysthymia (p=0.072) were associated with poorer results; repeating compulsion was also associated with lower odds of responding to treatment (p=0.104).In the second stage of statistical analysis, all variables associated with results in the first analysis were included in the multivariate model, and the variables that retained significance were: female sex (ORAdjusted=2.58; p=0.021); WHOQOL-BREF psychological domain (ORAdjusted=1.05; p=0.011); insight (ORAdjusted=2.67; p=0.042) and CGI-severity before GCBT (ORAdjusted=0.62; p=0.045). Although we identified some factors associated with response to treatment, predicting which patients will benefit from therapy and which will not is still an open question. The reasons for such different outcomes may be associated with the heterogeneity of OCD and of the samples used in different studies, as well as with the lack of standardization of the psychotherapeutic techniques used. Finally, unspecific factors not associated with the person of the therapist, the quality of the therapeutic relationship, and the patient’s motivation and tolerance to frustration may play an important role that remains to be evaluated.

Orientador: Albina Rodrigues Torres / Resumo: Introdução: O transtorno obsessivo-compulsivo (TOC) apresenta expressiva heterogeneidade de sintomas. Análises fatoriais têm mostrado que obsessões e compulsões de simetria, ordenação, repetição e contagem se caracterizam como uma dimensão separada. Apesar de a dimensão de simetria ser manifestação comum do TOC, estudos sobre esta dimensão são escassos na literatura. Objetivo: investigar a prevalência, a gravidade e o perfil sociodemográfico e clínico de pacientes que apresentam sintomas da dimensão de simetria em uma amostra clínica de pacientes com TOC. Método: estudo transversal com 1001 pacientes do banco de dados do Consórcio Brasileiro de Pesquisa em Transtornos do Espectro Obsessivo-Compulsivo. Diversas variáveis independentes foram investigadas através de instrumentos estruturados, tais como: Questionário sobre história natural do TOC, Escalas de Yale-Brown (Y-BOCS) e Escala Dimensional de Sintomas Obsessivo-compulsivos (DY-BOCS), Escala de Fenômenos Sensoriais (USP-SPS), Inventário de Depressão de Beck (BDI), Escala de Crenças de Brown (BABS) e Entrevista Clínica Estruturada para Transtornos do Eixo I do DSM-IV (SCID-I). Após a análise descritiva, foram feitas análises bivariadas entre possíveis fatores associados à presença da dimensão de simetria através do teste de qui-quadrado ou exato de Fisher e o teste t de Student ou Mann-Whitney. Como medidas de tamanho de efeito, foram calculadas razões de chances (odds ratios-OR) com intervalos de confiança e D de Cohen. P... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Introduction: Obsessive-compulsive disorder (OCD) presents an expressive heterogeneity of symptoms. Factorial analyses have shown that obsessions and compulsions of symmetry, ordering, repetition, and counting are characterized as a separate symptom dimension. Although the symmetry dimension is a common manifestation of OCD, studies on this dimension are scarce in the literature. Objective: to investigate the prevalence, severity, and the sociodemographic and clinical profile of patients with symmetry symptoms in a clinical sample of OCD patients. Method: a cross-sectional study with 1001 patients from the database of the Brazilian Research Consortium on Obsessive-Compulsive Spectrum Disorders. Several independent variables were investigated through structured instruments, such as: OCD Natural History Questionnaire, Yale-Brown Obsessive-Compulsive Scale (Y-BOCS), Dimensional Obsessive-Compulsive Scale (DY-BOCS), Sensory Phenomena Scale (USP-SPS), Beck Depression Inventory (BDI), Brown Assessment of Beliefs Scale (BABS), and Structured Clinical Interview for DSM-IV Axis I Disorders (SCID-I). After the descriptive analysis, bivariate analyses were performed between possible factors associated with the presence of the symmetry dimension using the chi-square or Fisher's exact test and the Student's t-test or Mann-Whitney test. As measures of effect size, odds ratios (ORs) with confidence intervals and Cohen's D were calculated. Finally, a logistic regression was performed to cont... (Complete abstract click electronic access below) / Mestre