Effects of Marijuana Use on Brain Structure and Function: Neuroimaging Findings from a Neurodevelopmental Perspective

Area of Science:

• Neuroscience
• Developmental Psychology
• Public Health

Background:

• Marijuana is a widely used recreational substance, with increasing prevalence.
• Adolescent marijuana use is associated with significant neurocognitive deficits.
• Neuroimaging studies are beginning to reveal brain alterations linked to marijuana's effects.

Purpose of the Study:

• To review current data on brain structural and functional abnormalities from marijuana use.
• To provide a neurodevelopmental framework for understanding these effects.
• To suggest future research directions for clarifying marijuana's impact on the developing brain.

Main Methods:

• Review of existing neuroimaging and neurocognitive research on marijuana use.
• Application of a neurodevelopmental perspective.
• Synthesis of current findings to identify knowledge gaps.

Main Results:

• Evidence suggests marijuana use alters brain structure and function.
• These alterations are particularly concerning when use begins in childhood or adolescence.
• The precise mechanisms underlying these neurodevelopmental effects require further investigation.

Conclusions:

• Marijuana use can lead to neurocognitive deficits, especially during critical developmental periods.
• Neuroimaging provides insights into the biological underpinnings of these deficits.
• Future research should focus on delineating long-term consequences and mechanisms in the developing brain.