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Thread: Cannabis may shrink brain, scientists report

  1. #1
    Senior Member Max's Avatar
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    Cannabis may shrink brain, scientists report

    Cannabis may shrink brain, scientists report



    Smoking cannabis for long periods of time may shrink parts of the brain that govern memory, emotion and aggression, according to researchers in Australia. Scientists used magnetic resonance imaging to scan the brains of people who admitted to smoking more than five joints a day for at least 10 years and compared them with brain images taken from non-drug users.
    Those who smoked cannabis regularly had on average a 12% smaller hippocampus, the part of the brain which is thought to be involved with emotion and memory, and a 7% smaller amygdala, which plays a role in regulating fear and aggression.
    For the study, researchers imaged the brains of 15 cannabis smokers and 16 individuals who did not use the drug. The scientists, led by Murat Yücel at the University of Melbourne and colleagues at the University of Wollongong, said scans on larger numbers of people were needed to confirm the extent of the effect.
    "Although modest use may not lead to significant neurotoxic effects, these results suggest that heavy daily use might indeed be toxic to human brain tissue," the scientists report in the journal Archives of General Psychiatry.
    Cannabis users also fared worse in tests of verbal memory and were more likely to have low-level symptoms of psychotic disorders such as schizophrenia and mania.
    Last month, a team at New York University scanned the brains of a group of 17- to 30-year-olds who had smoked cannabis two to three times a week for at least a year. In that study, the brains of drug users looked no different from those who had never taken cannabis.
    http://www.guardian.co.uk/science/20...rugsandalcohol

  2. #2
    Senior Member justadildo's Avatar
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    thats not all it shrunk !....OH, you looked down didn't you ?

  3. #3
    The important part.


    Quote Originally Posted by Max
    Cannabis may shrink brain, scientists report



    Smoking cannabis for long periods of time may shrink parts of the brain that govern memory, emotion and aggression, according to researchers in Australia. Scientists used magnetic resonance imaging to scan the brains of people who admitted to smoking more than five joints a day for at least 10 years and compared them with brain images taken from non-drug users.
    Those who smoked cannabis regularly had on average a 12% smaller hippocampus, the part of the brain which is thought to be involved with emotion and memory, and a 7% smaller amygdala, which plays a role in regulating fear and aggression.
    For the study, researchers imaged the brains of 15 cannabis smokers and 16 individuals who did not use the drug. The scientists, led by Murat Yücel at the University of Melbourne and colleagues at the University of Wollongong, said scans on larger numbers of people were needed to confirm the extent of the effect.
    "Although modest use may not lead to significant neurotoxic effects, these results suggest that heavy daily use might indeed be toxic to human brain tissue," the scientists report in the journal Archives of General Psychiatry.
    Cannabis users also fared worse in tests of verbal memory and were more likely to have low-level symptoms of psychotic disorders such as schizophrenia and mania.
    Last month, a team at New York University scanned the brains of a group of 17- to 30-year-olds who had smoked cannabis two to three times a week for at least a year. In that study, the brains of drug users looked no different from those who had never taken cannabis.
    http://www.guardian.co.uk/science/20...rugsandalcohol

  4. #4
    Quote Originally Posted by Max
    Scientists used magnetic resonance imaging to scan the brains of people who admitted to smoking more than five joints a day for at least 10 years and compared them with brain images taken from non-drug users.
    I was nearly set to read the journal article when NoDecafPlz mentioned that sentence. All in perspective, people. Marijuana is not the devil that the pharmaceutical companies and their hired henchpeople (e.g., politicians) would like us to believe.

    Where's the journal article(s) comparing cigarettes and alcohol to marijuana?

  5. #5
    Senior Member Imight's Avatar
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    id like to know who smokes 5 joints a day LOL.

  6. #6
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    Quote Originally Posted by Imight
    id like to know who smokes 5 joints a day LOL.
    Some of my old friends would easily burn 5 each before two in the afternoon. In the evening the entire house would be so smoke filled from J after J that you could swirl it around. Parents, kids and friends of both parents and kids smoking joint after joint non-stop.

  7. #7
    Senior Member justadildo's Avatar
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    i was gonna read that article..........but then i got stoned.......i got more brain shrinkage from neurontin...where are the studies about what all those scripts do to your gi tract ?...or how much dmg pain meds do to your liver ?

  8. #8
    The last 2 sentences from the above.

    Last month, a team at New York University scanned the brains of a group of 17- to 30-year-olds who had smoked cannabis two to three times a week for at least a year. In that study, the brains of drug users looked no different from those who had never taken cannabis.

  9. #9
    Anyone who smokes 5 joints a day qualifies as having a problem. You can overdo anything. Take 2 Tylenol 5 times a for 10 years and your liver would probably implode.

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