Navigation Links
Chronic Pot Smoking Affects Brain Chemistry, Scans Show
Date:6/7/2011

TUESDAY, June 7 (HealthDay News) -- Imaging scans show that chronic daily use of marijuana can have a detrimental effect on the brain, according to a new report.

In the study, researchers revealed that chronic use of the drug caused a decrease in the number of receptors involved in a wide array of important mental and bodily functions, including concentration, movement coordination, pleasure, pain tolerance, memory and appetite.

Marijuana, also known as cannabis, is abused more than any other illegal drug in America, according to the U.S. National Institute on Drug Abuse. When smoked or ingested, the drug's psychoactive chemical binds to numerous cannabinoid receptors in the brain and throughout the body, which influence a range of mental states and actions. One of two known types of cannabinoid receptors, called CB1, is involved primarily in the central nervous system.

In conducting the study, researchers compared the brains of 30 chronic daily marijuana smokers to non-smokers over the course of roughly four weeks. Using molecular imaging, researchers were able to visualize changes in the participants' brains and found the cannabinoid CB1 receptors of the smokers had decreased by roughly 20 percent compared to the otherwise healthy people with limited lifetime exposure to marijuana.

"With this study, we were able to show for the first time that people who abuse cannabis have abnormalities of the cannabinoid receptors in the brain," lead author Dr. Jussi Hirvonen said in a Society of Nuclear Medicine news release.

The researchers re-scanned 14 of the smokers after one month of abstinence and found a notable increase in receptor activity in areas that were deficient at the beginning of the study. These findings, the investigators concluded, suggest the adverse effects of chronic marijuana use are reversible.

"This information may prove critical for the development of novel treatments for cannabis abuse. Furthermore, this research shows that the decreased receptors in people who abuse cannabis return to normal when they stop smoking the drug," Hirvonen added.

The study, which was a collaboration between the U.S. National Institute of Mental Health and U.S. National Institute on Drug Abuse, was slated for presentation Monday at the annual meeting of the Society of Nuclear Medicine in San Antonio, Texas. Because this study was presented at a medical meeting, the data and conclusions should be viewed as preliminary until published in a peer-reviewed journal.

More information

The U.S. National Institute on Drug Abuse has more on marijuana and its effects on the brain.

-- Mary Elizabeth Dallas

SOURCE: Society of Nuclear Medicine, news release, June 6, 2011


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Young patients with chronic illnesses find relief in acupuncture
2. Exposure to 9/11 Fumes Tied to Chronic Headaches
3. One in Two Children Has Chronic Health Issues
4. Chronic Migraines Take a Greater Toll
5. Chronic Fatigue Syndrome-Virus Link Questioned
6. Study Suggests Low-Consuming Medicare Beneficiaries With Chronic Disease Are More Costly to Program
7. Chronic Back Pain Soothed by Cognitive Behavioral Therapy
8. Virus Unlikely to Cause Chronic Fatigue Syndrome
9. New Study: Improved Immune System with Gene-Eden, a Natural Antiviral Supplement that Targets Chronic Viruses
10. National Study Reports Staggering Spending Increases Among Seniors With Chronic Conditions Through Original Medicare - Special Needs Plan Program Offers Solution For Those In Texas
11. M. D. Anderson develops tool to measure severity of chronic graft-vs.-host disease symptoms
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Chronic Pot Smoking Affects Brain Chemistry, Scans Show
(Date:3/24/2017)... ... March 24, 2017 , ... “The Communion of Saints: A ... God in congregations across the United States. “The Communion of Saints” is ... who has served congregations in seven states throughout his long career of devotion ...
(Date:3/23/2017)... ... 23, 2017 , ... In 2016 the World Health Organization declared the Zika ... million Zika-related cases in the Americas within the next year. Lyme disease is one ... year skyrocketing to an estimated 329,000. Yet, Zika, Lyme and other insect borne illnesses ...
(Date:3/23/2017)... ... ... The physicians of KSF Orthopaedic Center PA are proud to announce the opening ... at 2255 E. Mossy Oaks Rd., Suite 440, Spring, Texas 77389 inside the new ... in the north Houston area (The Woodlands, Conroe, Magnolia, Kingwood, Humble) with an even ...
(Date:3/23/2017)... (PRWEB) , ... March 23, 2017 , ... Texas ... located at 960 Gruene Road in Building 2. The clinic is the group’s second ... Bennett, PT, says opening the company’s second New Braunfels location brings things full circle ...
(Date:3/23/2017)... ... ... The IoT (Internet of Things) is revolutionizing the way the world operates. ... and individual consumers alike. Laboratories can maximize their profit margin by increasing throughput. ... trillion to $11 trillion dollars by the year 2025. McKinsey expects the IoT to ...
Breaking Medicine News(10 mins):
(Date:3/24/2017)... , March 23, 2017  Mirabilis Medical, ... advanced medical technology for non-invasive surgery, announced today ... System for treatment of uterine fibroids throughout the ... had received approval from the US Food and ... the Mirabilis System in the United States.  The ...
(Date:3/23/2017)... Care, based in St. Joseph, Missouri , has selected AccuReg to ... located in 22 cities, and its flagship St. Joseph Medical Center. Mosaic ... health care to its patients, including the insurance, billing and collections processes. ... ... Care St. Joseph Medical Center ...
(Date:3/23/2017)... and INDIANAPOLIS , March ... LLY ) and the William Sansum Diabetes Center ... of Latino people affected by diabetes through enhanced research, ... of diabetes and cardiovascular disease bears a disproportionate weight ... ," said David Kerr , M.D., FRCPE, ...
Breaking Medicine Technology: