Electrophysiological biomarkers in dual pathology.

Introduction: The co-occurrence of substance use disorder with at least one other mental disorder is called dual pathology, which in turn is characterised by heterogeneous symptoms that are difficult to diagnose and have a poor response to treatment. For this reason, the identification and validation of biomarkers is necessary. Within this group, possible electroencephalographic biomarkers have been reported to be useful in diagnosis, treatment and follow-up, both in neuropsychiatric conditions and in substance use disorders.

Cannabis, schizophrenia and cognition: the contribution of brain connectivity.

The lack of consensus on the issue of whether the consumption of cannabis favors neurocognition among schizophrenia-diagnosed patients or not, plus methodological problems found in available evidence and the limitations of studies focused on diagnosis and treatment for positive symptoms are sufficient reason for designing new research proposals based on recent brain connectivity models. The objective of this paper is to review available literature databases, selected for neurocognition in cannabis-using schizophrenia patients and to analyze contributions made by functional connectivity studies. Cognitive impairment among schizophrenia patients is found even before the appearance of the first psychotic symptoms.

Problems associated with alcohol consumption by university students.

Objectives: The aim of this study was to analyze alcohol consumption by university students and psychosocial problems related.

Method: Descriptive correlational study that included 396 university students. The "Alcohol Use Disorders Identification Test"--(AUDIT)--and an "ad hoc" questionnaire were used as instruments to assess the associated problems.

Patterns of heroin use in a sample of consumers in Medellín--Colombia.

Introduction: In Colombia, there are no specific studies on the prevalence of heroin use. This paper reviews the patterns of substance use in a consumer group in the city of Medellín and its metropolitan area, showing that consumption is becoming a threat to public health due to the particular forms of consumption, among which risk practices are included.

Objective: To evaluate the use of heroin in the city of Medellín and its metropolitan area.