Ecstasy Users Had Worse Memory Than Controls or Cannabis Users, With Distinct Brain Changes
Ecstasy users performed significantly worse on learning and memory tasks than both controls and cannabis users, with distinct brain activation differences, though some neural changes overlapped between ecstasy and cannabis groups.
Quick Facts
What This Study Found
Twenty recreational ecstasy users, 14 cannabis users, and 20 controls completed a face-learning task during fMRI scanning.
Ecstasy users performed significantly worse at learning and remembering face-name associations compared to both controls and cannabis users.
Brain imaging revealed ecstasy-specific patterns: hyperactivity in bilateral frontal, temporal, parietal, and occipital regions, and hypoactivity in the right dorsal anterior cingulate cortex and left posterior cingulate.
Some brain activation changes overlapped between ecstasy and cannabis groups: both showed decreased activation in the right medial frontal gyrus, left parahippocampal gyrus, left dorsal cingulate, and left caudate.
These results identified both ecstasy-specific and shared ecstasy-cannabis neural effects, with the ecstasy-specific effects potentially related to neurotoxic damage to serotonergic brain regions.
Key Numbers
20 ecstasy users, 14 cannabis users, 20 controls. Ecstasy users performed significantly worse than both other groups. Ecstasy-specific hyperactivity in frontal, temporal, parietal, and occipital regions. Shared ecstasy-cannabis hypoactivity in four brain regions.
How They Did This
Cross-sectional fMRI study comparing 20 ecstasy users, 14 cannabis users (from a previously published study), and 20 controls on a face-name learning task. Conjunction analysis identified drug-specific and shared neural changes.
Why This Research Matters
By including a cannabis user comparison group, this study could separate effects attributable specifically to ecstasy from those that might be explained by concurrent cannabis use, a common confound in ecstasy research.
The Bigger Picture
Disentangling the cognitive effects of different substances is challenging because polydrug use is common. This study advanced understanding by directly comparing ecstasy and cannabis users on the same task.
What This Study Doesn't Tell Us
Cross-sectional design cannot determine causation. The ecstasy group likely used multiple drugs. Cannabis user data came from a separate study. Groups may have differed in unmeasured ways. Relatively small sample sizes.
Questions This Raises
- ?Are the shared brain changes between ecstasy and cannabis users caused by cannabis (which both groups used) or by a common vulnerability?
- ?Would these effects resolve with sustained abstinence?
- ?Do the ecstasy-specific effects reflect serotonergic neurotoxicity?
Trust & Context
- Key Stat:
- Ecstasy users performed worse than both controls and cannabis users on face-name learning
- Evidence Grade:
- Cross-sectional fMRI comparison with three groups. Cannabis user data from a separate study limits direct comparison. Small to moderate sample sizes.
- Study Age:
- Published in 2009. Understanding of ecstasy neurotoxicity has continued to develop, with most evidence supporting persistent serotonergic effects that differ from cannabis-related cognitive changes.
- Original Title:
- Learning and memory deficits in ecstasy users and their neural correlates during a face-learning task.
- Published In:
- Brain research, 1292, 71-81 (2009)
- Authors:
- Roberts, Gloria M P(2), Nestor, Liam(5), Garavan, Hugh(22)
- Database ID:
- RTHC-00388
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
Are the memory problems from ecstasy or cannabis?
Both substances showed some overlapping brain effects, but ecstasy users had unique brain changes and worse performance than cannabis users. The ecstasy-specific effects likely reflect serotonin-related neurotoxicity that cannabis does not produce.
Do these brain changes recover?
This cross-sectional study could not answer that question. Other research suggests some ecstasy-related brain changes may partially recover with sustained abstinence, while others may persist.
Read More on RethinkTHC
- THC-amygdala-anxiety-brain
- anandamide-weed-withdrawal
- cannabinoid-receptors-recovery-time
- cannabis-developing-brain-teenagers
- cant-enjoy-anything-without-weed
- dopamine-recovery-after-quitting-weed
- endocannabinoid-system-explained-simply
- endocannabinoid-system-withdrawal
- nervous-system-weed-withdrawal-fight-flight
- teen-weed-use-under-18-effects-brain
- thc-brain-withdrawal
- thc-prefrontal-cortex-brain-effects
- weed-cortisol-stress-hormones
- weed-memory-loss-recovery
- weed-motivation-amotivational-syndrome
- weed-nervous-system-effects
- weed-reward-system-brain
Cite This Study
https://rethinkthc.com/research/RTHC-00388APA
Roberts, Gloria M P; Nestor, Liam; Garavan, Hugh. (2009). Learning and memory deficits in ecstasy users and their neural correlates during a face-learning task.. Brain research, 1292, 71-81. https://doi.org/10.1016/j.brainres.2009.07.040
MLA
Roberts, Gloria M P, et al. "Learning and memory deficits in ecstasy users and their neural correlates during a face-learning task.." Brain research, 2009. https://doi.org/10.1016/j.brainres.2009.07.040
RethinkTHC
RethinkTHC Research Database. "Learning and memory deficits in ecstasy users and their neur..." RTHC-00388. Retrieved from https://rethinkthc.com/research/roberts-2009-learning-and-memory-deficits
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.