Ketamine, an N -methyl- d -aspartate antagonist, shows promise for treatment-resistant depression (TRD), with psychedelic doses potentially enhancing efficacy. However, its transient antidepressant effects and the need for repeated infusions raise concerns about optimal duration and long-term safety. Two clinical trials have tested the combination of ketamine with psychotherapy for depression, with mixed result...
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Psychiatric disorders are a significant cause of long-term disability and mortality. Although treatment is available, diagnostic accuracy is critical to provide adequate evidence-based treatment and to develop novel therapies. To inform the diagnostic process during clinical interviews, the use of validated assessment measures, including self-report questionnaires and structured interviews, is highly recommende...
Explicit information obtained through instruction profoundly shapes human choice behaviour. However, this has been studied in computationally simple tasks, and it is unknown how model-based and model-free systems, respectively generating goal-directed and habitual actions, are affected by the absence or presence of instructions. We assessed behaviour in a variant of a computationally more complex decision-makin...
Introdução: A Perturbação Obsessivo-Compulsiva (POC) é uma perturbação neuropsiquiátrica crónica cujo tratamento, farmacológico ou psicoterapêutico, é ineficaz numa percentagem significativa de casos, exigindo uma melhor compreensão da perturbação. Estudos realizados nestes doentes sugerem a existência de disfunção nos sistemas cerebrais responsáveis pela aprendizagem de novas acções, nomeadamente em circuitos ...