Mental, behavioural and Transtornos do neurodesenvolvimento are syndromes characterised by clinically significant disturbance in an individual's cognition, emotional regulation, or behaviour that reflects a dysfunction in the psychological, biological, or developmental processes that underlie mental and behavioural functioning. These disturbances are usually associated com distress or impairment in personal, family, social, educational, occupational, or other important areas of functioning.