There is increasing use of cannabis in Europe. This may have negative psychiatric consequences for both the development of young people and for individuals with a psychosis vulnerability. Finally, in view of more and better future studies, we need to develop an internationally accepted standard unit of cannabis use.

Mental health care for transitional age (16-24y) is a new hot topic, requiring adapted care, not child-, nor adult- psychiatric treatment. Flanders(Belgium) has 4 psychiatric wards for people in transition age. We look at specifics of this treatment program, merging the psychiatric and developmental perspective into useful tools. @ease is the Dutch variant of Australian Headspace, and opened its doors in 2018. At present 5 centres are operational and the first results on the youth attending the centres will be presented, as well as qualitative data on barriers and facilitators of accessing youth mental health services. Since 1999, the development of more than 100 “Maisons des Adolescents” (MDAs) has enabled young persons to gain access to specific care in integrated youth-friendly facilities in France. The various medical programmes of MDAs depend on the priorities of local teams rather and community needs as well as on official regulations. All MDAs offer essential services such as a “Health and Prevention Space” open daily and multidisciplinary consultations. The MDAs from the start addressed an age group in transition (young people aged 11-21 years) rather than a specific illness. The success of the MDA network is already widely acknowledged by users, professionals and policy makers. Findings on temperament, cognitive, genetic and functional imaging factors will be summarised in relevance towards both alcohol initiation and subsequent transition to heavy alcohol use in adolescence, offering important links in developing early proactive interventions targeting subgroups of adolescents at risk for future alcohol use disorder and addictive behaviours.

There is a growing interest in a transdiagnostic approach to psychiatric disorders that cuts across traditional diagnostic boundaries to provide new insights in understanding mental health problems. A possible important transdiagnostic factor in psychopathology is Effortful Control. Effortful Control or executive/cognitive control refers to the ability to regulate behavior, emotion and cognition. It has been identified as a contributor to both adaptive and adverse outcomes in children, adolescents and adults. Clinical research points out that individuals with low levels of Effortful Control are at increased risk for multiple types of psychopathology like eating disorders, substance use disorders, anxiety and mood disorders, …. Early assessment of Effortful Control and early interventions to improve Effortful Control might help to prevent or decrease the risk on developing a broad spectrum of psychiatric disorders in children, adolescents and adults. This presentation includes recent research on the role of EC in psychopathology across the lifespan and therapeutic implications: 1) The role of effortful control and the Dual Pathway model in childhood obesity; 2) The role of effortful control in substance use disorders; 3) The role of effortful control and executive attention in mood disorders; 4) The role of effortful control in pyschopathology amongst older psychiatric patients.

Although psychiatrists and neurologists value close collaboration, their areas of interest and professional skills differ. Besides, among other psychiatric disorders, Alzheimer's disease has a rather unclear position. So the questions of whether Alzheimer's disease is a neurological or a psychiatric disease and the branch of physicians who will treat dementia are still relevant. Two discussants will present their points of view to broaden the joint discussion on dementia and treating physicians