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Memory, speed of thinking get worse over time with marijuana use
Eurekalert ^ | 03/13/06 | American Academy of Neurology

Posted on 03/13/2006 6:23:52 PM PST by Moonman62

Memory, speed of thinking and other cognitive abilities get worse over time with marijuana use, according to a new study published in the March 14, 2006, issue of Neurology, the scientific journal of the American Academy of Neurology.

The study found that frequent marijuana users performed worse than non-users on tests of cognitive abilities, including divided attention (ability to pay attention to more than one stimulus at a time) and verbal fluency (number of words generated within a time limit). Those who had used marijuana for 10 years or more had more problems with their thinking abilities than those who had used marijuana for five to 10 years. All of the marijuana users were heavy users, which was defined as smoking four or more joints per week.

"We found that the longer people used marijuana, the more deterioration they had in these cognitive abilities, especially in the ability to learn and remember new information," said study author Lambros Messinis, PhD, of the Department of Neurology of the University Hospital of Patras in Patras, Greece. "In several areas, their abilities were significant enough to be considered impaired, with more impairment in the longer-term users than the shorter-term users."

The study involved people ages 17 to 49 taking part in a drug abuse treatment program in Athens, Greece. There were 20 long-term users, 20 shorter-term users and 24 control subjects who had used marijuana at least once in their lives but not more than 20 times and not in the past two years. Those who had used any other class of drugs, such as cocaine or stimulants, during the past year or for more than three months throughout their lives were not included in the study. Before the tests were performed, all participants had to abstain from marijuana for at least 24 hours.

The marijuana users performed worse in several cognitive domains, including delayed recall, recognition and executive functions of the brain. For example, on a test measuring the ability to make decisions, long-term users had 70 percent impaired performance, compared to 55 percent impaired performance for shorter-term users and 8 percent impaired performance for non-users. In a test where participants needed to remember a list of words that had been read to them earlier, the non-users remembered an average of 12 out of 15 words, the shorter-term users remembered an average of nine words and the long-term users remembered an average of seven words.

###

The American Academy of Neurology, an association of more than 19,000 neurologists and neuroscience professionals, is dedicated to improving patient care through education and research. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as stroke, Alzheimer's disease, epilepsy, Parkinson's disease, autism and multiple sclerosis.

For more information about the American Academy of Neurology, visit www.aan.com.


TOPICS: Culture/Society
KEYWORDS: adoperloser; dope; drugskilledbelushi; junkscience; marijuana; moralabsolutes; mrleroybait; pot; potheads; whytheycallitdope; wod; wodlist
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To: mugs99

If you can find a link to the actual study, would you ping me? I am sort of curious to read it myself.


41 posted on 03/13/2006 7:08:33 PM PST by somniferum
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To: Moonman62

Yes, they are correct. It dumbs you down and SLOWS you down.


42 posted on 03/13/2006 7:09:23 PM PST by nmh (Intelligent people recognize Intelligent Design (God) !)
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To: Looking4Truth

The best antidote to excessive self destructive pot use, which causes the caution, and the moderation, is a burning ambition to achieve one's goals, that one has set for oneself, in which one's ego heavily invested, and which becomes a rather hard wiring and almost consuming matter of self respect. I wish I could put it better, but that is my experience. But man oh man what it fun, in certain contexts. It was grand!


43 posted on 03/13/2006 7:09:25 PM PST by Torie
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To: Moonman62

faster than normal?


44 posted on 03/13/2006 7:11:06 PM PST by dangus
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To: catbertz

Taquitos from Whataburger, the ultimate 2:00am food!!


45 posted on 03/13/2006 7:12:59 PM PST by Vasilli22 (http://www.richardfest.blogspot.com/)
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To: Moonman62
No, they don't.

What were we talking about?

46 posted on 03/13/2006 7:13:04 PM PST by Revolting cat! ("In the end, nothing explains anything.")
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To: somniferum

Perhaps he looked on the site and then forgot the article by the time he got back.

http://www.neurology.org/cgi/content/abstract/66/5/737?lookupType=volpage&vol=66&fp=737&view=short


47 posted on 03/13/2006 7:14:15 PM PST by Mojave
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To: somniferum; mugs99
If you can find a link to the actual study, would you ping me? I am sort of curious to read it myself.

You have to be a subscriber to read the actual article, but the Abstract is free.

48 posted on 03/13/2006 7:15:17 PM PST by DouglasKC
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To: mugs99

In oher words, this is your brain, and this is your brain on drugs. Any questions?


49 posted on 03/13/2006 7:16:22 PM PST by DouglasKC
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To: Billthedrill
Excellent summation, and I also dropped my occasional use years ago. One more point to make:

The market for drugs by casual users who don't "Buy American" fuels the cartels who run Northern Mexico and acerbate our porous border problem...endangering the lives of our law enforcement personnel and the hapless illegals coerced into "muling".

Just like how the illegals would self-deport if their use was too costly to employers, the hyper-violent cartels (and the gangers on this side who work with them) would be rendered impotent if their market dried up.
50 posted on 03/13/2006 7:17:26 PM PST by NewRomeTacitus
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To: Mojave
NEW YORK (Reuters Health) - People who regularly smoke marijuana may find their memories growing hazy over time, a study published Monday suggests

DENVER — A new study conducted by researchers at the University at Albany, State University of New York concludes that marijuana users are less depressed.
In what was the largest-ever study of marijuana and depression, daily or weekly marijuana users had fewer symptoms of depression than non-users. Marijuana users were also more likely to report positive moods and fewer somatic complaints such as sleeplessness.
. .
51 posted on 03/13/2006 7:17:38 PM PST by mugs99 (Don't take life too seriously, you won't get out alive.)
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To: wagglebee

That's why we used to call it getting "wasted".


52 posted on 03/13/2006 7:18:11 PM PST by little jeremiah (Tolerating evil IS evil.)
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To: Mojave; DouglasKC

Thanks!


53 posted on 03/13/2006 7:18:15 PM PST by somniferum
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To: somniferum; mugs99
Thanks!

You're welcome. Since mugs99 claimed the item wasn't there, I was pretty sure it would be.

54 posted on 03/13/2006 7:20:07 PM PST by Mojave
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To: somniferum
If you can find a link to the actual study, would you ping me? I am sort of curious to read it myself

I will, but don't hold your breath. It doesn't show up on any study search.
.
55 posted on 03/13/2006 7:22:26 PM PST by mugs99 (Don't take life too seriously, you won't get out alive.)
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To: mugs99
Marijuana users were also more likely to report positive moods and fewer somatic complaints such as sleeplessness.

Well, of course. They can't remember enough to be worried about. Ignorance is bliss.

56 posted on 03/13/2006 7:22:29 PM PST by Moonman62 (Federal creed: If it moves tax it. If it keeps moving regulate it. If it stops moving subsidize it)
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To: mugs99

Keep digging.


57 posted on 03/13/2006 7:23:59 PM PST by Mojave
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To: Moonman62
All of the marijuana users were heavy users, which was defined as smoking four or more joints per week.

From what I've been told by people that know (my personal knowledge is more than 20 years old),Anybody that talks about smoking Joints these days is either smoking ditch weed or alfalfa.

I've been told that the "top of the line" stuff is green( when I was young we were after the Gold,The Green stuff was crap) and very potent.

And only very low grade stuff would be smoked in a joint,Because the "good" stuff is too expensive and too potent to smoke a joint.

58 posted on 03/13/2006 7:24:15 PM PST by HP8753 (My cat loves watching "When Animals Attack")
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To: mugs99

Yes, pot does prevent sleeplessness. Definitely. But then, when you wake up in the late morning, you don't feel like doing jumping jacks. You feel like you need an aspirin.


59 posted on 03/13/2006 7:25:53 PM PST by Torie
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To: Moonman62

uh...what?


60 posted on 03/13/2006 7:26:35 PM PST by Uriah_lost (http://www.wingercomics.com/d/20051205.html)
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