Researchers at the University of Montreal and CHU Sainte-Justine Research Centre have traced the origins of ADHD, substance abuse and conduct disorder, and found that they develop from the same neurocognitive deficits, which in turn explains why they often occur together.

“Psychopathology exists on multiple continua of brain function. Some of these dimensions contribute to a multitude of problems, others contribute to specific problems. Together, they explain patterns of comorbidity such as why ADHD and conduct problems co-occur with substance misuse at such a high rate,” explained study author, Patricia Conrod. 

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