Regular cannabis users showed impaired ability to regulate negative emotions in brain scans
An fMRI study found that regular marijuana users had weaker ability to downregulate negative emotions, with disrupted communication between the amygdala and prefrontal cortex during emotional regulation tasks.
Quick Facts
What This Study Found
Researchers compared 23 regular marijuana users to 20 non-using controls using brain imaging during an emotion regulation task. Participants viewed negative images and were asked to use cognitive reappraisal, essentially reframing the meaning of what they saw to reduce its emotional impact.
Cannabis users showed significantly worse emotion regulation success on the behavioral level. Their brain scans revealed increased activity in frontal motor regions during reappraisal attempts, which the researchers interpreted as an unsuccessful attempt to recruit additional neural resources to compensate for impaired regulation.
Critically, cannabis users showed impaired ability to dampen amygdala activity during emotion regulation. This was accompanied by decreased functional connectivity between the amygdala and the dorsolateral prefrontal cortex, a connection considered essential for top-down emotional control. The amygdala essentially was not receiving the regulatory signals from higher brain regions as effectively.
Key Numbers
23 regular marijuana users and 20 non-using controls. Cannabis users showed significantly worse behavioral emotion regulation (p < 0.05). Increased frontal network activity in users during reappraisal (p < 0.05, FWE corrected). Impaired amygdala downregulation with decreased amygdala-DLPFC connectivity (p < 0.05, FWE corrected).
How They Did This
This was a cross-sectional fMRI study comparing 23 regular marijuana users to 20 demographically matched non-using controls. Participants completed a cognitive emotion regulation (reappraisal) paradigm during brain scanning. Both behavioral performance and neural activity patterns were measured and compared between groups.
Why This Research Matters
Difficulty regulating negative emotions is a known risk factor for mental health problems and substance use disorders. If regular cannabis use impairs the brain circuits responsible for emotion regulation, this could create a feedback loop where cannabis is used to cope with negative emotions but simultaneously weakens the brain's own capacity to manage them.
The Bigger Picture
This study connects cannabis use to a fundamental psychological process that underlies mental resilience. Emotion regulation deficits have been linked to depression, anxiety, PTSD, and continued substance use. Understanding how cannabis affects these neural circuits helps explain the complex relationship between cannabis use and mental health outcomes.
What This Study Doesn't Tell Us
The cross-sectional design cannot determine whether cannabis caused the emotion regulation deficits or whether people with pre-existing deficits were more likely to use cannabis. The sample was small. The study did not assess specific cannabis use parameters like potency, strain, or frequency in detail. Only one type of emotion regulation strategy (reappraisal) was tested.
Questions This Raises
- ?Do emotion regulation deficits reverse after cannabis cessation?
- ?Are certain individuals more susceptible to these neural changes based on genetics or baseline brain function?
- ?Does the age of onset of cannabis use affect the severity of emotion regulation impairment?
Trust & Context
- Key Stat:
- Disrupted amygdala-prefrontal connectivity during emotion regulation in cannabis users
- Evidence Grade:
- This is a small cross-sectional neuroimaging study that identifies neural correlates but cannot establish causation.
- Study Age:
- Published in 2017. Neuroimaging research on cannabis and emotion has continued to develop since.
- Original Title:
- Emotion regulation deficits in regular marijuana users.
- Published In:
- Human brain mapping, 38(8), 4270-4279 (2017)
- Authors:
- Zimmermann, Kaeli(3), Walz, Christina, Derckx, Raissa T, Kendrick, Keith M, Weber, Bernd, Dore, Bruce, Ochsner, Kevin N, Hurlemann, René, Becker, Benjamin
- Database ID:
- RTHC-01560
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
Does cannabis help or hurt with managing emotions?
This study suggests that while people may use cannabis to feel better in the moment, regular use is associated with weaker brain circuits for emotion regulation. The amygdala-prefrontal connection that allows for top-down emotional control appeared disrupted in regular users.
Is this damage permanent?
The study could not answer this because it only measured users at one point in time. Whether these neural changes reverse with abstinence would require longitudinal research following users who stop consuming.
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Cite This Study
https://rethinkthc.com/research/RTHC-01560APA
Zimmermann, Kaeli; Walz, Christina; Derckx, Raissa T; Kendrick, Keith M; Weber, Bernd; Dore, Bruce; Ochsner, Kevin N; Hurlemann, René; Becker, Benjamin. (2017). Emotion regulation deficits in regular marijuana users.. Human brain mapping, 38(8), 4270-4279. https://doi.org/10.1002/hbm.23671
MLA
Zimmermann, Kaeli, et al. "Emotion regulation deficits in regular marijuana users.." Human brain mapping, 2017. https://doi.org/10.1002/hbm.23671
RethinkTHC
RethinkTHC Research Database. "Emotion regulation deficits in regular marijuana users." RTHC-01560. Retrieved from https://rethinkthc.com/research/zimmermann-2017-emotion-regulation-deficits-in
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.