Which came first: Cannabis use or deficits in impulse control?

Area of Science:

• Neuroscience
• Psychology
• Addiction Research

Background:

• Impulse control deficits frequently co-occur with substance use disorders (SUDs).
• The relationship between impulsivity and SUDs is well-established for cocaine and alcohol, but less understood for cannabis use disorder (CUD).
• Adolescent cannabis use initiation occurs during a critical brain development period, raising questions about long-term effects.

Purpose of the Study:

• To review the existing literature on the relationship between impulsivity and CUD.
• To examine the directionality of this relationship: does impulsivity precede CUD, or vice versa?
• To explore the psychological and biological underpinnings of impulsivity in CUD.

Main Methods:

• Literature review synthesizing preclinical and clinical data.
• Analysis of impulsivity as a multi-dimensional construct.
• Discussion of findings across different research modalities.

Main Results:

• The link between impulsivity and SUDs is complex, with ongoing debate about causality.
• Limited research specifically addresses impulsivity in the context of CUD.
• Adolescence is a key period for understanding the impact of cannabis on brain development and behavior.

Conclusions:

• Further research is needed to clarify the intricate relationship between impulsivity and CUD.
• Longitudinal studies are crucial for determining the directionality of effects.
• Understanding impulsivity's role is vital for CUD prevention and treatment strategies.