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  1. Alfa
    POT ALTERS BLOOD FLOW: STUDY


    Narrows Arteries


    Affects Memory


    WASHINGTON-- (reuters) Marijuana users have faster blood flow in their brains, even after a month of not smoking, U.S. researchers reported Monday.


    The findings suggest they have narrowed arteries, similar to patients with high blood pressure and dementia, and could help explain reports that heavy marijuana users have trouble on memory tests, says the researchers at the National Institute on Drug Abuse in Baltimore.


    Ronald Herning and Jean Lud Cadet tested 54 marijuana users, who smoked anywhere between two and 350 joints a week, and 18 non-smokers.


    They used Doppler sonograms to measure blood flow in volunteers' brains at the beginning of the study and a month later, after everyone agreed to abstain from marijuana for the four weeks.


    The smokers had faster blood flow, both at the start and after a month of abstinence, Herning and Cadet reported in the journal Neurology.


    The smokers also had a higher pulsatility index score, or PI, which measures the amount of resistance to blood flow. The researchers believe the higher PI is caused by narrower blood vessels.


    "The marijuana users had PI values that were somewhat higher than those of people with chronic high blood pressure and diabetes," Herning says in a statement.


    "However, their values were lower than those of people with dementia. This suggests that marijuana use leads to abnormalities in the small blood vessels in the brain."


    They found that blood flow improved in people who smoked up to 70 marijuana cigarettes a week -- people they defined as moderate users -- after a month of avoiding cannabis.


    Heavy users, who smoked up to 350 joints a week, saw no change in blood flow even after a month, the researchers says.


    Researchers at Montreal's McGill University have reported that chronic consumers of cannabis lose molecules called CB1 receptors in the brain's arteries. This reduces blood flow to the brain, causing attention deficits, memory loss, and impaired learning ability.

Comments

  1. poweredbyhate
    "Ronald Herning and Jean Lud Cadet tested 54 marijuana
    users, who smoked anywhere between two and 350 joints a week, and 18
    non-smokers."



    Who smokes 350 joints a week?! That's a lot of marijuana.
    There's no way somebody is averaging 50 joints per day on a regular
    basis. I've known some serious potheads, but nobody I've heard
    of, even a person I know that uses it legally for medicinal reasons,
    would ever smoke that much.



    Interesting study, by the way.

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  2. Peyote
    Nice one Alfa, insteresting.
  3. Qish
    wait, so all of that means its bad to smoke pot right.



    "The smokers had faster blood flow, both at the start and
    after a month of abstinence, Herning and Cadet reported in the journal
    Neurology."



    is having fast blood flow good for anything? is that a bad thing or a good thing?



    from the mood of it, it all sounds bad..

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  4. Alicia
    at the end of the day who cares alot it is all scare stories, well some
    things are true, but .. each to there own..
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