Navigation Links
Early 'Pot' Use May Harm Brain More: Study
Date:11/15/2010

MONDAY, Nov. 15 (HealthDay News) -- People who started smoking marijuana at a young age did much worse on tests of executive brain function than those who started smoking when they were older, a new study shows.

The findings highlight the danger posed by marijuana and the need to develop effective strategies to reduce marijuana use, especially among young people, said the researchers. They noted that adolescence is a critical time in brain development.

Executive function includes planning, flexibility, abstract thinking and inhibition of inappropriate responses.

The study of 33 chronic marijuana smokers and 26 nonsmokers found that, overall, habitual marijuana users appeared less able to maintain focus and were more likely to make errors.

Those who started smoking before age 16 made twice as many mistakes on tests of executive function as those who started smoking the drug after age 16. The early-onset users also smoked three times as much marijuana per week and twice as often as the late-onset users.

"Our data suggest that the earlier you begin smoking, the more marijuana you smoke and the more frequently you smoke. That's an important finding," study author Staci A. Gruber, director of the Cognitive and Clinical Neuroimaging Core at McLean Hospital in Belmont, Mass.m, and an assistant professor of psychiatry at Harvard Medical School, said in a hospital news release.

"We have to be clear about getting the message out that marijuana isn't really a benign substance," she added. "It has a direct effect on executive function. The earlier you begin using it, and the more you use of it, the more significant the effect."

The study was to be presented Nov. 15 at the annual meeting of the Society for Neuroscience in San Diego.

More information

Baycrest has more about executive function.

-- Robert Preidt

SOURCE: McLean Hospital, news release, Nov. 15, 2010


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

Related medicine news :

1. Early Intro to Math Seems to Improve Kids Skills Later
2. National Cancer Institute awards nearly $4 million to University of New Mexico Cancer Center
3. Fred Hutchinson Cancer Research Center scientist receives Presidential Early Career Award
4. Study Warns of Risks for Early Dialysis
5. JCI online early table of contents: Nov. 8, 2010
6. Scientists Report Early Success in Growing Mini Liver in Lab
7. Noninvasive Test for Colon Cancer Shows Promise in Early Trial
8. Early Humans More Advanced Than Thought
9. Healthy Living Can Prevent Nearly 25% of Colorectal Cancers
10. The brains journey from early Internet to modern-day fiber optics -- all in 1 lifetime
11. Haptoglobin as an early serum biomarker of virus-induced type 1 diabetes in rats
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Early 'Pot' Use May Harm Brain More: Study
(Date:3/24/2017)... ... March 24, 2017 , ... “Vintage and Harvest A Cultivation of Christian Love” ... teacher residing in North Carolina with his wife, Anna Marie. He and his wife ... grandchildren. David is also the author of “Shadow and Substance.” , “Love, the agape ...
(Date:3/24/2017)... ... March 24, 2017 , ... “The Adventures of Joey, The Dog ... dog who lives his life to the fullest, as God intended. “The Adventures of ... Holmgren, a mother and grandmother pursuing her passion for writing, especially about truth and ...
(Date:3/23/2017)... CO (PRWEB) , ... March 23, 2017 , ... A ... bar for entry into teacher preparation programs. The NCTQ report suggests, based on a ... entry requirements would significantly improve teacher quality in the U.S. It argues that this ...
(Date:3/23/2017)... ... March 23, 2017 , ... Demonstrating their commitment ... more public health departments have been awarded national accreditation through the Public ... into the expanding network of communities across the nation whose health departments meet ...
(Date:3/23/2017)... ... March 23, 2017 , ... PAINWeekEnd (PWE) ... 10 North Broadway Avenue, will be an educational and exciting program providing busy ... the management of chronic pain. , Oklahoma is in a healthcare crisis. The ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... Research and Markets has announced the addition of the ... report to their offering. ... The Global Cryostat Market is poised to grow ... reach approximately $3.5 billion by 2025. This industry report ... on global as well as regional levels presented in the research ...
(Date:3/23/2017)... , March 23, 2017 ... research report created through extensive primary research (inputs ... the report aims to present the analysis of ... of Procedure (Replacement and Repair); Replacement Procedure By ... Repair By Technique (Surgical Devices, Balloon Valvuloplasty, Transcatheter ...
(Date:3/23/2017)... Iowa , March 23, 2017   BioSpace ... career resource, has partnered with Indiana Biosciences Research ... organizations and educational institutions to bring the ... the first-ever BioIndiana Hotbed map, an artistic representation of ... print was presented to Vice President Mike Pence ...
Breaking Medicine Technology: