Related Experiment Videos
Increased visual cortical excitability in ecstasy users: a transcranial magnetic stimulation study.
1Department of Psychology, University of Palermo, Palermo, Italy. maxoliveri@tiscalinet.it
Journal of Neurology, Neurosurgery, and Psychiatry
|July 24, 2003
Summary
Recreational ecstasy use is linked to increased visual cortex excitability, as shown by lower phosphene thresholds in users. Higher frequency of use correlated with visual hallucinations, indicating potential neurochemical changes.
Area of Science:
- Neuroscience
- Psychopharmacology
Background:
- Recreational drug use, particularly ecstasy (3,4-methylenedioxymethamphetamine), can impact neurobiological functions.
- The visual cortex is a potential target for psychoactive substances due to its complex processing capabilities.
Purpose of the Study:
- To investigate abnormalities in visual cortical excitability among recreational ecstasy users.
- To determine if ecstasy use affects the brain's visual processing centers.
Main Methods:
- Employed single pulse transcranial magnetic stimulation (TMS) targeting the occipital cortex in both ecstasy users and a control group.
- Measured and compared the phosphene threshold, a key indicator of cortical excitability, between the two groups.
Main Results:
- Ecstasy users exhibited significantly lower phosphene thresholds compared to controls, indicating heightened visual cortical excitability.
- A negative correlation was observed between the frequency of ecstasy use and phosphene thresholds.
- Phosphene thresholds were significantly lower in ecstasy users who reported visual hallucinations.
Conclusions:
- Recreational ecstasy consumption is associated with enhanced visual cortex excitability.
- This increased excitability may be related to the neurochemical effects of ecstasy, specifically involving serotonin pathways.
- Findings suggest a potential link between ecstasy-induced neurochemical alterations and perceptual disturbances like visual hallucinations.