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Marijuana's effects on young brains diminish 72 hours after use, research says
CNN ^ | April 19th, 2018 | By Mark Lieber

Posted on 04/19/2018 7:58:56 AM PDT by Mariner

(CNN)Marijuana is notorious for slowing certain cognitive functions such as learning, memory and attention span (maybe that's why they call it "dope"?). But new research in young people suggests that these cognitive effects, while significant, may not persist for very long, even among chronic users.

The meta-analysis, published Wednesday in the journal JAMA Psychiatry, combines data from 69 previous studies that look at the effects of heavy cannabis use on cognitive functioning in adolescents and young adults. It found that those young people who identified as heavy marijuana users scored significantly lower than non-users in a variety of cognitive domains such as learning, abstraction, speed of processing, delayed memory, inhibition and attention.

"There have been a couple of meta-analyses done in adult samples, but this is the first one to be done specifically in adolescent and young adult samples," said Cobb Scott, assistant professor of psychiatry at the Perelman School of Medicine at the University of Pennsylvania and a lead author of the study.

"We looked at everything from learning and memory to different aspects of executive functioning such as abstraction ability," Scott said. "And we basically showed that the largest effects -- which was around a third of a standard deviation -- was in the learning of new information and some aspects of executive functioning, memory and speed of processing."

But when the researchers separated the studies based on length of abstinence from marijuana use, the difference in cognitive functioning between marijuana users and non-users was no longer apparent after 72 hours of marijuana abstinence. That could be an indication "that some of the effects found in previous studies may be due to the residual effects of cannabis or potentially from withdrawal effects in heavy cannabis users," Scott said.

(Excerpt) Read more at cnn.com ...


TOPICS: Business/Economy; Culture/Society; News/Current Events
KEYWORDS: brain; cannabis; marijuana; pot; potheads; wod
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This is your brain on pot.
1 posted on 04/19/2018 7:58:56 AM PDT by Mariner
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To: Mariner
From the Ca-ca News Network. “Nough said.
2 posted on 04/19/2018 8:04:12 AM PDT by Missouri gal
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To: Missouri gal

The source is JAMA Psychiatry.

You would know that if you read past the headline.

Have you been smoking pot?


3 posted on 04/19/2018 8:06:00 AM PDT by Mariner (War Criminal #18)
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To: Mariner

lol!


4 posted on 04/19/2018 8:06:38 AM PDT by babble-on
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To: Mariner

what a twisting of what previous trials have shown and this one. 72 hours after use... a chronic user (teenager stoner) is using more. The dosing of THC and cogener compounds that have genetic thread destructive effects (on the fatty acid chains and other links)... is cumulative. In a sense until it reaches blood levels that are “steady state”. The pharmacokinetics.

Sorry, had to comment. These brains are still growing (as they are learning)... so it is doubly destructive. Separate from the pharmacology that makes it a Class 1 Narcotic. When your 80— who cares? This destroys youth.


5 posted on 04/19/2018 8:08:57 AM PDT by John S Mosby (SIC SEMPER TYRANNIS)
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To: Mariner

Chronic users never go 72 hours without dope.


6 posted on 04/19/2018 8:09:17 AM PDT by tennmountainman ("Prophet Mountainman" Predicter Of All Things RINO...for a small fee.)
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To: Mariner

This is the kid whose brain is on pot behind the wheel of the car on the same road with your loved ones...


7 posted on 04/19/2018 8:11:22 AM PDT by mewzilla (Has the FBI been spying on members of Congress?)
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To: tennmountainman

The point of the study is that the observed changes to function are not permanent.


8 posted on 04/19/2018 8:11:58 AM PDT by Mariner (War Criminal #18)
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To: Mariner

After all night partying, took my SAT’s one Saturday morning, after boning up in the parking lot, and again at the break.

Got into MENSA on the scores. My fellow pothead friends thought that was funny as $hit. Me, too.

Swimmers are notorious potheads. Olympic swimmers even. More than a few Pro motorcycle racers are, too. While racing. I know several.

I know current CEO’s (yes, plural) who regularly partake. And run startup medical device companies. And are very, very wealthy. I know cops, lawyers, and even a CPA who partake.

It’s not for everybody. I gave it up long ago. But people who condemn pot smokers with a broad brush are giggled at (heh) by pretty successful weed smokers. Reefer madness is plain ignorant.


9 posted on 04/19/2018 8:12:48 AM PDT by Basket_of_Deplorables (Trump has implemented Supply Side Economics!!!)
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To: tennmountainman

“Chronic users never go 72 hours without dope.”

Precisely. What happens after constant use over a long period of time?


10 posted on 04/19/2018 8:12:51 AM PDT by Parley Baer
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To: Mariner

All I can say, is that I’ve never broken up a fight between people high on weed. I’ve been to murder scenes where alcohol was an instigating factor.


11 posted on 04/19/2018 8:13:32 AM PDT by TallahasseeConservative (Isaiah 40:31)
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To: Mariner

> “But new research in young people suggests that these cognitive effects, while significant, may not persist for very long, even among chronic users.”

Until they light up their next joint.

CNN idiots. But I repeat myself.


12 posted on 04/19/2018 8:13:57 AM PDT by Hostage (Article V)
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To: Mariner

CNN (cannabis news network.) Enough said.


13 posted on 04/19/2018 8:16:34 AM PDT by fwdude (History has no 'sides;' you're thinking of geometry.)
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To: Mariner

CNN (cannabis news network.) Enough said.


14 posted on 04/19/2018 8:16:35 AM PDT by fwdude (History has no 'sides;' you're thinking of geometry.)
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To: Basket_of_Deplorables

“But people who condemn pot smokers with a broad brush are giggled at (heh) by pretty successful weed smokers. “

It’s pandemic in the tech business, which I am familiar with.

All those folks inventing cutting edge tech that changed everyone’s life are high as a kite.

At least they are several times per week.

And, part of that culture is “never high at work”.


15 posted on 04/19/2018 8:16:42 AM PDT by Mariner (War Criminal #18)
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To: Mariner

I suppose then that this is clinical proof that liberals were >> that stupid << without needing to smoke pot.


16 posted on 04/19/2018 8:17:25 AM PDT by MeganC (There is nothing feminine about feminism.)
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To: Mariner
"But when the researchers separated the studies based on length of abstinence from marijuana use, the difference in cognitive functioning between marijuana users and non-users was no longer apparent after 72 hours of marijuana abstinence."

But if you are a regular user, the ill-effects don't go away because you keep on smoking and that 72-hour threshold never arrives.
17 posted on 04/19/2018 8:19:18 AM PDT by Steve_Seattle
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To: Mariner

Good news for John Boehner’s new business venture.

http://www.freerepublic.com/focus/f-news/3646705/posts


18 posted on 04/19/2018 8:20:11 AM PDT by Wolfie
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To: tennmountainman
"Chronic users never go 72 hours without dope."

Beat me to it.
19 posted on 04/19/2018 8:20:31 AM PDT by Steve_Seattle
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To: Mariner

"Dude.....wait......what?"

20 posted on 04/19/2018 8:21:26 AM PDT by dfwgator
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