Trastorno bipolar:Enfoques teóricos

· Bipolar disorder: Biological perspective Bipolar disorder: Evolutionary-neurodevelopmental perspective Bipolar disorder: Psychodynamic perspective Bipolar disorder: Cognitive perspective Bipolar disorder: Interpersonal perspective Contents 1 Research findings 1.1 Heritability 1.2 Recent genetic research 1.3 Medical imaging 1.4 Personality types Research findings Heritability Bipolar disorder appears to run in families. The rate of suicide is higher in people who have bipolar disorder than in the general population. En realidad, people with bipolar disorder are about twice as likely to commit suicide as those suffering from major depression (12% Para 6%). Más de dos tercios de las personas con trastorno bipolar tienen al menos un pariente cercano con el trastorno o con depresión mayor unipolar, indicando que la enfermedad tiene un componente genético. Los estudios que buscan identificar la base genética del trastorno bipolar indican que la susceptibilidad proviene de múltiples genes. Scientists are continuing their search for these genes using advanced genetic analytic methods and large samples of families affected by the illness. Los investigadores tienen la esperanza de que la identificación de los genes de susceptibilidad para el trastorno bipolar, y las proteínas cerebrales que codifican, permitirá desarrollar mejores tratamientos e intervenciones preventivas dirigidas al proceso de la enfermedad subyacente. Recent genetic research Bipolar disorder is considered to be a result of complex interactions between genes and environment. The monozygotic concordance rate for the disorder is 70%. Esto significa que si una persona tiene el trastorno, un gemelo idéntico tiene un 70% probabilidad de tener el trastorno también. Los gemelos dicigóticos tienen un 23% tasa de concordancia. En 2003, a group of American and Canadian researchers published a paper that used gene linkage techniques to identify a mutation in the GRK3 gene as a possible cause of up to 10% of cases of bipolar disorder. This gene is associated with a kinase enzyme called G protein receptor kinase 3, which appears to be involved in dopamine metabolism, and may provide a possible target for new drugs for bipolar disorder.[1] Medical imaging Researchers are using advanced brain imaging techniques to examine brain function and structure in people with bipolar disorder, particularly using the functional MRI and positron emission topography. An important area of neuroimaging research focuses on identifying and characterizing networks of interconnected nerve cells in the brain, interactions among which form the basis for normal and abnormal behaviors. Researchers hypothesize that abnormalities in the structure and/or function of certain brain circuits could underlie bipolar and other mood disorders and studies have found anatomical differences in areas such as the subgenual prefrontal cortex[2] and hippocampus. Better understanding of the neural circuits involved in regulating mood states, and genetic factors such as the FAT-0 chromosome linked to bipolar disorder[3], may influence the development of new and better treatments and may ultimately aid in early diagnosis and even a cure. Personality types An evolving literature exists concerning the nature of personality and temperament in bipolar disorder patients, compared to major depressive disorder (unipolar) patients and non-sufferers. Such differences may be diagnostically relevant. Using MBTI continuum scores, bipolar patients were significantly more extroverted, intuitive and perceiving, and less introverted, sensing, and judging than were unipolar patients. This suggests that there might be a correlation between the Jungian extraverted intuiting process and bipolar disorder.


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