975 resultados para emotional stress


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Abstract OBJECTIVE Discussing the factors associated with major depression and suicide risk among nursing professionals. METHOD An integrative review in PubMed/MEDLINE, LILACS, SciELO and BDENF databases, between 2003 and 2015. RESULTS 20 published articles were selected, mostly from between 2012 and 2014, with significant production in Brazil. Nursing professionals are vulnerable to depression when young, married, performing night work and having several jobs, and when they have a high level of education, low family income, work overload, high stress, insufficient autonomy and a sense of professional insecurity and conflict in the family and workrelationship. Suicide risk was correlated with the presence of symptoms of depression, high levels of emotional exhaustion, depersonalization and low personal accomplishment; characteristics of Burnout Syndrome. CONCLUSION Suicide risk among nursing professionals is associated with symptoms of depression and correlated with Burnout Syndrome, which can affect work performance.

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OBJECTIVES: The aim of this study was to evaluate right ventricular (RV) and left ventricular function and pulmonary circulation in chronic mountain sickness (CMS) patients with rest and stress echocardiography compared with healthy high-altitude (HA) dwellers. BACKGROUND: CMS or Monge's disease is defined by excessive erythrocytosis (hemoglobin >21 g/dl in males, 19 g/dl in females) and severe hypoxemia. In some cases, a moderate or severe increase in pulmonary pressure is present, suggesting a similar pathogenesis of pulmonary hypertension. METHODS: In La Paz (Bolivia, 3,600 m sea level), 46 CMS patients and 40 HA dwellers of similar age were evaluated at rest and during semisupine bicycle exercise. Pulmonary artery pressure (PAP), pulmonary vascular resistance, and cardiac function were estimated by Doppler echocardiography. RESULTS: Compared with HA dwellers, CMS patients showed RV dilation at rest (RV mid diameter: 36 ± 5 mm vs. 32 ± 4 mm, CMS vs. HA, p = 0.001) and reduced RV fractional area change both at rest (35 ± 9% vs. 43 ± 9%, p = 0.002) and during exercise (36 ± 9% vs. 43 ± 8%, CMS vs. HA, p = 0.005). The RV systolic longitudinal function (RV-S') decreased in CMS patients, whereas it increased in the control patients (p < 0.0001) at peak stress. The RV end-systolic pressure-area relationship, a load independent surrogate of RV contractility, was similar in CMS patients and HA dwellers with a significant increase in systolic PAP and pulmonary vascular resistance in CMS patients (systolic PAP: 50 ± 12 mm Hg vs. 38 ± 8 mm Hg, CMS vs. HA, p < 0.0001; pulmonary vascular resistance: 2.9 ± 1 mm Hg/min/l vs. 2.2 ± 1 mm Hg/min/l, p = 0.03). Both groups showed comparable systolic and diastolic left ventricular function both at rest and during stress. CONCLUSIONS: Comparable RV contractile reserve in CMS and HA suggests that the lower resting values of RV function in CMS may represent a physiological adaptation to chronic hypoxic conditions rather than impaired RV function. (Chronic Mountain Sickness, Systemic Vascular Function [CMS]; NCT01182792).

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Background: Neuroticism is a personality component frequently found in anxious and depressive psychiatric disorders. The influence of neuroticism on negative emotions could be due to its action on stimuli related to fear and sadness, but this remains debated. Our goal was thus to better understand the impact of neuroticism through verbal and physiological assessment in response to stimuli inducing fear and sadness as compared to another negative emotion (disgust).¦Methods: Fifteen low neurotic and 18 high neurotic subjects were assessed on an emotional attending task by using film excerpts inducing fear, disgust, and sadness. We recorded skin conductance response (SCR) and corrugator muscle activity (frowning) as indices of emotional expression.¦Results: SCR was larger in high neurotic subjects than in low neurotics for fear relative to sadness and disgust. Moreover, corrugator activity and SCR were larger in high than in low neurotic subjects when fear was induced.¦Conclusion: After decades of evidence that individuals higher in neuroticism experience more intense emotional reactions to even minor stressors, our results indicate that they show greater SCR and expressive reactivity specifically to stimuli evoking fear rather than to those inducing sadness or disgust. Fear processing seems mainly under the influence of neuroticism. This modulation of autonomic activity by neurotics in response to threat/fear may explain their increased vulnerability to anxious psychopathologies such as PTSD (post traumatic stress disorder).

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Summary Mood disorders are among the most prevalent, psychosocial^ debilitating, chronic and relapsing forms of psychiatric illnesses. Despite considerable advances in their characterization, the heterogeneous nature of susceptibility factors and patient's symptoms could account for the lack of totally effective and remissive treatment. The neurobiological hypothesis of mood disorders etiology has evolved since the monoamine and neurotrophin theories and current evidence is pointing toward their integration in a broader polygenic epistatic model resulting in defective neuroplasticity of circuitries involved in emotion processing. Consequently, the unraveling of molecular underpinning pathways involved in neuronal plasticity, commonly altered among mood disorder syndromes and symptoms, should shed light on their etiology and provide new drug target. The transcription factor CREB has been critically involved in the long-lasting forms of neuronal plasticity and in the regulation of several mood disorders susceptibility genes. In addition, altered CREB activity has been associated with mood disorders pathophysiology and pharmacotherapy. Interestingly, the newly-identified protein CREB-regulated transcription coactivator 1 (CRTC1) was shown by previous studies in the laboratory to be a neuroactivity- dependent cAMP and calcium sensor, a potent activator of CREB-dependent transcription and involved in neuroplasticity mechanisms associated with long-term synaptic potentiation. Furthermore, the major mood disorder susceptibility gene Bdnf was suggested to be transcriptional regulated by CRTC1. Therefore, we aimed to investigate a role for CRTC1 in mood disorders by generating and characterizing a Crtcl deficient mouse model at the behavioral and molecular levels. Interestingly, their comprehensive characterization revealed a behavioral profile mirroring several major symptoms comorbid in mood disorders, including altered social interactions, aggressive behaviors, obesity, psychomotor retardation, increased emotional response to stress, decreased sexual drive and depression-like behaviors. To investigate the molecular mechanisms underlying these pathological behaviors and the implication of CRTC1 in the regulation of CREB-regulated genes in vivo, we also quantified transcript levels of several relevant CREB-regulated susceptibility genes in brain structures involved in the pathophysiology of mood disorders. Strikingly, we found the underexpression of primary components of the neurotrophin system: Bdnf and its cognate receptor TrkB, a marked decrease in the Nr4a family of transcription factors, implicated in neuroplasticity and associated with dopamine-related disorders, as well as in several other relevant CREB regulated genes. Moreover, neurochemical analysis revealed that Crtcl null mice presented alteration in prefrontal cortical monoamine turnover as well as in hippocampal and accumbal serotonin levels, similarly associated with mood disorders etiology and pharmacotherapy. Together, the present thesis supports the involvement of CRTC1 pathway hypofunction in the pathogenesis of mood disorders and specifically in pathological aggression, obesity and depression-related behavior comorbidities. Ultimately, CRTC1 may represent an interesting antidepressant, antiaggressive or mood stabilizer drug target candidate through the modulation of major CREB regulated susceptibility genes. Les troubles de l'humeur comptent parmi les maladies psychiatriques les plus prévalentes, psychosocialement débilitantes, chroniques et avec le plus grand risque de rechute. Malgré de considérable avancées dans leur caractérisation, la nature hétérogène des facteurs de susceptibilité et des symptômes présentés par les patients, semble justifier l'absence de traitement entraînant une rémission complète de la maladie. L'hypothèse de l'étiologie neurobiologique des troubles de l'humeur a évolué depuis la théorie des monoamines et des neurotrophines. Actuellement, elle tend à les englober dans un modèle polygénique épistatique induisant une déficience de la neuroplasticité des circuits impliqué dans la régulation des émotions. Par conséquent, il apparaît particulièrement relevant de caractériser des voies moléculaires impliquées dans la plasticité neuronale, communément altérées parmi les différents syndromes et symptômes des maladies de l'humeur, afin d'améliorer leur compréhension ainsi que de proposer de nouvelles cibles thérapeutiques potentielles. Le facteur de transcription CREB a été de façon répétée et cohérente impliqué dans les mécanismes à long terme de la plasticité neuronale, ainsi que dans la régulation de plusieurs gènes de susceptibilité aux maladies de l'humeur. De plus, une altération dans l'activité de CREB a été impliqué dans leur étiologie et pharmacothérapie. De façon intéressante, des résultats préliminaires sur la protéine récemment découverte CREB-regulated transcription coactivator 1 (CRTC1) ont indiqué que son activation était dépendante de l'activité neuronale, qu'il était un senseur du calcium et de l'AMPc, ainsi qu'un coactivateur de CREB requis et puissant impliqué dans les mécanismes de plasticité neuronale associés à la potentialisation à long terme. En outre, des résultats ont suggéré que le gène majeur de susceptibilité Bdnf est régulé par CRTC1. Ainsi, notre objectif a été d'investiguer un rôle éventuel de CRTC1 dans les maladies de l'humeur en générant et caractérisant une lignée de souris déficiente pour Crtcl, tant au niveau comportemental que moléculaire. De façon intéressante, leur caractérisation détaillée a révélé un profil comportemental reflétant de nombreux aspects des maladies de l'humeur incluant une altération des interactions sociales, une agression pathologique, l'obésité, un retard psychomoteur, une réponse émotionnelle au stress accrue, une diminution de la motivation sexuelle, et des comportements reliés à la dépression. Afin d'investiguer les mécanismes moléculaires sous- jacents cette altération du comportement, ainsi que l'implication de CRTC1 dans l'expression des gènes régulés par CREB in vivo, nous avons quantifié les niveaux de transcrits de plusieurs gènes de susceptibilité régulés par CREB et impliqués dans la physiopathologie des maladies de l'humeur. Remarquablement, nous avons trouvé la sous-expression de composants primordiaux du système neurotrophique: Bdnf et son récepteur TrkB, une diminution majeure de la famille des facteurs de transcription Nr4a, impliqués dans la neuroplasticité et associés à des désordres liés à la dopamine, ainsi que de nombreux autres gènes relevants régulés par CREB. De plus, une analyse neurochimique a révélé que les souris déficientes pour Crtcî présentent une altération du turn-over des monoamines du cortex préfrontal ainsi que des niveaux hippocampaux et accumbaux de sérotonine, associés de façon similaire dans l'étiologie et la pharmacothérapie des maladies de l'humeur. Vue dans son ensemble, la présente thèse supporte l'implication d'une sous-régulation de la voie de CRTCI dans la pathogenèse des maladies de l'humeur ainsi que dans la comorbidité de l'agression pathologique, l'obésité et la dépression. En conclusion, CRTCI pourrait représenter une cible médicamenteuse intéressante aux propriétés antidépressante, antiagressive ou stabilisatrice de l'humeur au travers de la modulation de gènes de susceptibilité majeurs régulés par CREB.

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BACKGROUND: The amygdala, hippocampus, medial prefrontal cortex (mPFC) and brain-stem subregions are implicated in fear conditioning and extinction, and are brain regions known to be sexually dimorphic. We used functional magnetic resonance imaging (fMRI) to investigate sex differences in brain activity in these regions during fear conditioning and extinction. METHODS: Subjects were 12 healthy men comparable to 12 healthy women who underwent a 2-day experiment in a 3 T MR scanner. Fear conditioning and extinction learning occurred on day 1 and extinction recall occurred on day 2. The conditioned stimuli were visual cues and the unconditioned stimulus was a mild electric shock. Skin conductance responses (SCR) were recorded throughout the experiment as an index of the conditioned response. fMRI data (blood-oxygen-level-dependent [BOLD] signal changes) were analyzed using SPM8. RESULTS: Findings showed no significant sex differences in SCR during any experimental phases. However, during fear conditioning, there were significantly greater BOLD-signal changes in the right amygdala, right rostral anterior cingulate (rACC) and dorsal anterior cingulate cortex (dACC) in women compared with men. In contrast, men showed significantly greater signal changes in bilateral rACC during extinction recall. CONCLUSIONS: These results indicate sex differences in brain activation within the fear circuitry of healthy subjects despite similar peripheral autonomic responses. Furthermore, we found that regions where sex differences were previously reported in response to stress, also exhibited sex differences during fear conditioning and extinction.

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Objectif : Le monoxyde d'azote (NO) régule la pression artérielle en modulant le tonus vasculaire périphérique et l'activité sympathique vasoconstrictrice. La synthèse du NO est altérée dans plusieurs maladies cardiovasculaires importantes. La perte de l'effet vasodilatateur du NO et de son effet freinateur sur la décharge sympathique pourrait entraîner une réponse vasopressive exagérée au stress mental. Méthodes : Nous avons donc comparé les réponses sympathique (activité nerveuse musculaire sympathique) et hémodynamique au stress mental pendant une perfusion isotonique de NaCI et lors de l'administration d'un inhibiteur systémique de la NO- synthase (NG-monomethyl-L-arginine, L-NMMA). Résultats : Le résultat principal est que le stress mental qui pendant la perfusion saline augmente l'activité nerveuse sympathique d'environ 50% et la pression artérielle moyenne d'environ 15%, n'a eu aucun effet sympathoexcitateur et vasopresseur détectable lors de la perfusion de L-NMMA. Ces observations ne sont pas liées à une atteinte généralisée de la réponse hémodynamique et/ou sympathique lors de la perfusion de L-NMMA, car ces réponses étaient conservées lors de l'immersion de la main dans de l'eau glacée. Conclusions : Le stress mental induit des effets vasopresseurs et sympathoexcitateurs chez l'homme qui sont médiés par le NO. Ces résultats laissent penser que, contrairement à ce qui a été généralement supposé, le NO peut dans certaines circonstances augmenter la pression artérielle in vivo.

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The systemic response to injury or infection is often accompanied by significant alterations in host metabolism and glucose homeostasis. Within the liver, these changes include a decrease in glycogenesis and an increase in gluconeogenesis, and in peripheral tissues, the development of insulin resistance and the increased utilization of glucose by non-insulin-dependent pathways. Depending on the severity and the duration of the response, both hyper- and hypoglycemia can ensue and each can become a clinically important manifestation of the systemic inflammatory response. The protein known as macrophage migration inhibitory factor (MIF) has been identified recently to play a central role in host immunity and to regulate glucocorticoid effects on the immune and inflammatory systems. MIF is released in vivo from activated immune cells as well as by the anterior pituitary gland upon stimulation of the hypothalamic-pituitary-adrenal axis. MIF also has been found to be secreted together with insulin from the pancreatic beta-cells and to act as an autocrine factor to stimulate insulin release. Since circulating MIF levels are elevated during stress or systemic inflammatory processes, this protein may play a central role in the control of insulin secretion during various disease states.

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O presente trabalho tem com objectivo explicar de forma breve, o stress ocupacional. Para isso descrevem-se as suas causas e consequências, recomendações de como prevenir e controlar o stress ocupacional, mostrando como pode influenciar a saúde dos colaboradores. Para a sua realização fez-se uma revisão bibliográfica sobre o stress, stress ocupacional, agentes estressores e formas de encará-los, trabalho docente e o stress ocupacional na Escola Salesiana de Artes e Ofícios (E.S.A.O.). Para atingir os objectivos fez-se estudo exploratório, a abordagem quantitativa, inquérito por questionário e análise documental. A revisão bibliográfica permitiu o enquadramento teórico do tema. O tratamento dos dados realizou-se através da análise pelo SPSS. A amostra foi constituída por 30 professores do ensino básico e secundário da E.S.A.O. De acordo com a revisão bibliográfica era de esperar uma relação entre o trabalho dos professores e o stress ocupacional assim como os efeitos psicossociais associados ao mesmo. Os resultados obtidos através da análise dos dados, não suportaram as hipóteses colocadas anteriormente e serão discutidos no capítulo referente às conclusões.

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Objective: This pilot study aims at assessing Constructive Thinking in a sample of adolescent offenders and in a normative sample of adolescents. Method: 66 adolescent offenders (12-18 years) were compared to 540 control adolescents on the different subscales of the "Constructive Thinking Inventory". Results and Conclusion: Adolescent offenders show a less efficient Constructive Thinking: they show cognitive styles that may hamper their ability to take appropriate decisions when facing stressful situations, increasing self-defeating behaviors. Interventions may focus on improving adequate coping with stress.

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Being repeatedly confronted to very difficult situations since childhood influences the way indivuals will later respond to even mildly stressful events. The hypothalamic-pituitary-adrenal axis (HPA) is a complex system implicated in regulating neuroendocrine responses to stress. Its activation produces among others the <stress hormonea, cortisol. However, the regulation of the physiological response to stress depends on psychological factors linked with the representations that individuals develop regarding their close relationships i.e. attachment. Furthermore, attachment representations seem to be associated with oxytocin, a hormone involved both in cortisol reduction and in positive social behaviours.

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Este trabalho é o resultado de uma investigação realizada junto dos enfermeiros do serviço de Urgência do Hospital Baptista de Sousa, onde tem-se como titulo “Stress e o Enfermeiro: Implicações do Stress na prestação de cuidados no Serviço de Urgência”. Tem como objectivo principal conhecer o processo de desenvolvimento do stress nos enfermeiros do Serviço de urgência do Hospital Dr. Baptista de Sousa, ou seja, tentar perceber junto dos enfermeiros deste serviço as causas e as consequências do stress no desempenho das suas actividades. A investigação foi desenvolvida a partir de uma revisão de literatura, sendo o estudo de cariz qualitativa e, para a recolha dos dados considerados relevantes foi necessário a realização de uma entrevista junto dos enfermeiros, semiestruturada, para além desta foi utilizado a técnica de observação participante e descritiva exploratória, como meio de obtenção de máxima informação dos enfermeiros sobre esta temática e tentar compreendê-la. A actuação do enfermeiro por si só já é considerada como stressante, lidando com vidas humanas que constantemente necessitam de cuidados, onde o mesmo tem que estar preparado tanto físico como psicologicamente para satisfazer as necessidades dos utentes. No entanto, quando não conseguem lidar com os problemas encontrados, pode haver um desequilíbrio psicológico, consequentemente o stress. O trabalho se encontra divido em partes, primeiro a introdução, onde está descrito o tema em questão e o propósito deste trabalho, seguidamente o primeiro capítulo, englobando a problemática e a justificação do tema como também os objectivos geral e específicos para dar resposta a pertinência em questão, neste mesmo capítulo está inserida também a concepção teórica. No segundo capítulo enquadra-se a explicação metodológica como também a análise de conteúdo. E por fim as considerações finais acerca deste trabalho, seguido das referências bibliográficas, utilizadas durante o desenrolar desta investigação.

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Active protein-disaggregation by a chaperone network composed of ClpB and DnaK + DnaJ + GrpE is essential for the recovery of stress-induced protein aggregates in vitro and in Escherichia coli cells. K-glutamate and glycine-betaine (betaine) naturally accumulate in salt-stressed cells. In addition to providing thermo-protection to native proteins, we found that these osmolytes can strongly and specifically activate ClpB, resulting in an increased efficiency of chaperone-mediated protein disaggregation. Moreover, factors that inhibited the chaperone network by impairing the stability of the ClpB oligomer, such as natural polyamines, dilution, or high salt, were efficiently counteracted by K-glutamate or betaine. The combined protective, counter-negative and net activatory effects of K-glutamate and betaine, allowed protein disaggregation and refolding under heat-shock temperatures that otherwise cause protein aggregation in vitro and in the cell. Mesophilic organisms may thus benefit from a thermotolerant osmolyte-activated chaperone mechanism that can actively rescue protein aggregates, correctly refold and maintain them in a native state under heat-shock conditions.

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SUMMARY (Français au-dessous)After the Second World War, the role of the victim in criminal conflict became an objectof interest for academics. But it was only in the 1960s that the importance of providingprotection and assistance to crime victims was highlighted in particular by the victims'movement, which inaugurated a new era of criminal justice in systems throughout the world.Moving beyond just the role of controlling crime and punishing the offender, the criminaljustice system also began to contribute to the victims' rehabilitation and to help the victim tomove on from the event psychologically and emotionally.Although some criminological research has been conducted, to date the effect that thecriminal justice system and victim support services have on the well-being of crime victims isstill uncertain.The current study sought to understand better the healing process of victims of crime, thepotential consequences of their participation on the criminal justice system, and the supportof victim centers. Moreover, it aimed to find out whether the existence of a Victim SupportAct would change the treatment that the victim receives in the criminal justice system. Thusthis research was conducted based in two countries - Switzerland and Brazil - where theoutcome of the victims' movement on the criminal justice system was different, as was theparticipation of the victim in the criminal justice system and the government's provision ofsupport.In order to conduct this research we employed the qualitative method, which is the mostefficient to gather sensitive information. Interviews with crime victims were the main sourceof information. Hearing observation and document research were used as complementarysources.The results of this research show that victims who have contact with the criminal justicesystem and victim services are not more likely to recover than those who had no contact. Thisis to say, the support offered has no major effects; the influence of the criminal justice systemand the victim support services in the emotional well-being of crime victims is rather neutral.However, considering that the sample is not representative, findings are not expected to begeneralized. Instead, findings may give insight to practitioners or to future criminal justicepolicy makers, suggesting what may work to improve the emotional well-being of crimevictims, as well as suggesting further studies.________________________________________________________________________________RÉSUMÉAprès la deuxième guerre mondiale, le rôle de la victime est devenu un objet d'intérêtpour les académiciens. Par contre, c'est seulement dans les années 60 que l'importance defournir de la protection et de l'appui aux victimes d'infractions a été accentuée, en particulierpar un mouvement ― victims' mouvement ―, qui a inauguré un nouveau temps dans lajustice pénale des systèmes juridiques du monde entier. A part la fonction de contrôler lecrime et de punir le délinquant, le système de justice pénale joue également un rôle dans laréhabilitation des victimes.Malgré la réalisation de plusieurs recherches criminologiques sur ce sujet, les effets que lesystème de la justice pénale et les centres d'aides aux victimes ont sur le bien-être desvictimes d'infractions est encore incertain.Ainsi cette étude cherche à mieux comprendre le processus de réhabilitation des victimesd'infraction, les conséquences de leur participation dans le système de justice pénale ainsique la portée de l'appui des centres d'aide. De plus, l'étude vise à découvrir si l'existenced'une loi d'aide aux victimes, particulièrement la Loi d'Aide aux Victimes d'InfractionsLAVI, est susceptible de changer le traitement que la victime reçoit dans le système de lajustice pénale. Pour cela, elle a été conduite dans deux pays - la Suisse et le Brésil - où lesconséquences du mouvement des victimes sur le système de la justice pénale a eu undéveloppement différent; il en va de même pour la participation de la victime dans laprocédure pénale et pour l'appui offert par l'Etat.Cette étude utilise la méthode qualitative qui est la plus efficace pour le recueild'informations sensibles. La plus importante source des données sont les interviews avec lesvictimes. L'observation des audiences et l'analyse de documents ont été utilisés en tant quesources d'information complementáire.Les résultats de cette recherche montrent que les victimes qui ont porté plainte et qui ontreçu l'appui des centres d'aides ne sont pas mieux rétablies que celles qui n'ont rien fait. C'estainsi que nous avons conclu que les services offerts n'ont aucune influence dans ce processus.Cependant, considérant que notre échantillon n'est pas représentatif, il n'est pas possible degénéraliser nos résultats. Néanmoins, ceux-ci peuvent éclairer les praticiens ou les futursdécideurs politiques de la justice pénale, suggérant ce qui peut fonctionner pour lerétablissement des victimes d'infraction, aussi bien que suggérer d'autres études.

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Background and Objectives: To specify which of the documented cognitive and emotional deficits characterize adolescents with conduct disorder (CD) compared with high-risk controls. Methods: High-risk adolescent males with and without CD were compared on intellectual efficiency, cognitive flexibility, impulsivity, alexithymia, and cognitive coping strategies. Substance use was controlled for in analyses. Results: Both groups showed normal intellectual efficiency and cognitive flexibility, as weil as heightened alexithymia and bebavioral impulsivity. Youths with CD evidenced more self-defeating and black-and-white tbinking under stress, and more acting-out under negative affect, than those without CD. Conclusions: Deficits specifie to CD resided in facets of emotional functioning and cognitive coping that might be targeted by a coping skills intervention.