866·323·5612 FREE HELPLINE

Marijuana's Memory Effects Tied to Misfiring Brain Cells

Marijuana's well-known effects on short-term memory may be the result of misfiring brain cells, according to neuroscientists.

Scientific American reported Nov. 20 that David Robbe of Rutgers University and colleagues found that rats given THC -- the active ingredient in marijuana -- and a synthetic cannabinoid experienced disruptions in the synchronous brain-cell firing that causes memories to be formed. The drugs also slowed brain-wave activity, notably theta and fast-ripple waves but also gamma waves.

Theta and gamma waves are believed to be involved in short-term memory formation, while the fast-ripple waves are thought to play a role in moving such memories into long-term storage.

At very high doses, the drugs appeared to prevent learning altogether.

"Overall, our findings indicate that under the influence of cannabinoids, neurons are liberated from population control," the researchers wrote in the online version of the journal Nature Neuroscience.



Reference:
Robbe, D., et al. (2006) Cannabinoids reveal importance of spike timing coordination in hippocampal function. Nature Neuroscience, published online: 11/19/2006, doi: 10.1038/nn1801.

« Previous Page

Treatment Center News

• ADHD Students Prescribed Stimulant Medications Less Likely to Abuse Other Drugs
• What Effects Do Anabolic Steroids Have On Behavior?
• Counseling Curbs Heavy College Drinking, Researchers Say
• Federal Court Says Va. Alcohol Laws Constitutional
• New Study Reports Alcohol Most Abused Substance In Rural Areas
• Screening For Alcohol Abuse and Alcohol-Related Problems in College Populations
• Report Shows Healthy Decline in Smoking During Pregnancy
• Study Links Drinking with Obesity
• What is a Safe Level of Drinking?
• Nicotine Withdrawal Starts Within Minutes of Smoking

Treatment Centers

Contact Treatment Centers