How is substance use linked to psychosis? A study of the course and patterns of substance dependence in psychosis.

Substance use in mentally ill patients is now a major problem that influences the course and outcome of psychosis. With prevalence ranging up to 60%, several theories were postulated to explain the link. It would be interesting to know if substances have different effects in persons with psychosis than in those without.

Auditory P300 study in remittent bipolar child and adolescent population.

Objectives: Previous studies have revealed P300 abnormality in adult bipolar population, both in acute and euthymic phases and also in their first-degree relatives. To the best of our knowledge there are limited data in the child and adolescent bipolar population. In this study we attempt to record P300 amplitudes and latencies of remittent child and adolescent bipolar patients and compare them with normal controls.

Event-related potential: An overview.

Electroencephalography (EEG) provides an excellent medium to understand neurobiological dysregulation, with the potential to evaluate neurotransmission. Time-locked EEG activity or event-related potential (ERP) helps capture neural activity related to both sensory and cognitive processes. In this article, we attempt to present an overview of the different waveforms of ERP and the major findings in various psychiatric conditions.