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Smoking cannabis as a teenager lowers IQ - study

Habitually smoking cannabis as a teenager, when the brain is undergoing critical development, may have an adverse impact on IQ levels.

HABITUALLY SMOKING CANNABIS as a teenager could affect a person’s IQ, according to new research.

A study that tracked more than 1,000 adolescents in New Zealand from youth into middle age found those who began habitually smoking cannabis before the age of 18 experienced up to an eight-point drop in IQ between the ages of 18 and 38. The average IQ is 100 points and a drop of eight represents a fall from the 50th percentile to the 29th.

The IQs of all study subjects were measured at the age of 13, before habitual cannabis use began, and cannabis use was then assessed at five “waves” at the ages of 18, 21, 32 and 38, with the researchers controlling for the use of other drugs and education levels.

Those who experienced an eight-point drop in IQ were those who began smoking in adolescence and engaged in “habitual smoking” – ie using cannabis more than four days a week – during three “waves” or more.

Those who began smoking in adolescence but used cannabis less persistently experienced a drop in their IQs, but the drop was less pronounced than in those who had used cannabis early and persistently, according to the New York Times.

People who did not smoke until after adolescence showed no adverse effects on intelligence, according to the study.

“Collectively, these findings are consistent with speculation that cannabis use in adolescence, when the brain is undergoing critical development, may have neurotoxic effects,” wrote Madeline Meier, lead researcher and a post-doctoral associate at Duke University.

The research appears in Proceedings of the National Academy of Sciences.

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73 Comments
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    Mute Phil Magee
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    Jul 24th 2016, 8:20 PM

    Reminds me of the time the soldiers sued because the noise of gunfire damaged their hearing…

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    Mute The Girl
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    Jul 24th 2016, 8:24 PM

    Yep. I am pretty sure they were aware of the consequences and made a career out of it. I may be wrong but the job description is foe you to be thrown around and hit so what’s the complaint?

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    Mute Lorem Ipsum
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    Jul 24th 2016, 8:27 PM

    People might accept a level of risk but that doesn’t mean their employers shouldn’t take reasonable steps to minimise that risk, like by employing competent doctors or allowing people to wear hearing protection

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    Mute Phil Magee
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    Jul 24th 2016, 8:31 PM

    ‘People might accept a level of risk’…what like soldiers and professional fighters? Some comment…

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    Mute Lorem Ipsum
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    Jul 24th 2016, 9:31 PM

    Yes, like soldiers and fire fighters. What’s your point?

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    Mute Vincent Wallace
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    Jul 24th 2016, 11:00 PM

    Yrs and now they where ear plugs protective helmets covering their ears or ear muffs on a shooting range. Which was the point the soldiers sued and why some of them won none of these where provided at the time.

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    Mute Fluffer TheCanary
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    Jul 24th 2016, 11:43 PM

    or taking out insurance for potential claims. and then you’re sold the insurers story in a sugar pill

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    Mute Yeah Ok
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    Jul 24th 2016, 8:16 PM

    The list of wrestlers is basically a who’s who’s of people who’ve burnt their bridges many years ago. Can’t help but think a lot have ulterior motives!

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    Mute KM TON
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    Jul 24th 2016, 8:28 PM

    Exactly what I said last week on here. so close that I think you’ve stolen it

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    Mute Gareth Wogan
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    Jul 24th 2016, 8:36 PM

    Well what ya gonna do brother when yeah ok runs all over you!

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    Mute Alan b
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    Jul 24th 2016, 10:50 PM

    I think the two of you have to settle this in the ring

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    Mute Watchful Axe
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    Jul 24th 2016, 8:12 PM

    They might have a good case.

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    Mute Andrew Christian Troy
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    Jul 24th 2016, 9:15 PM

    I notice the refs (Hebners)are on the list as well. Strange as the bumps they took were very mild.

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    Mute colm connolly
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    Jul 24th 2016, 10:14 PM

    It was less the bumps they took and more the unsafe working conditions the case is not just based on brain injury

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    Mute Fluffer TheCanary
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    Jul 24th 2016, 11:44 PM

    not as far as the insurers are concerned, and they have the money to spin the media

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    Mute Adam
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    Jul 24th 2016, 8:31 PM

    They knew what they were signing up to. Shouldn’t have a leg to stand on.

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    Mute @aidoroch
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    Jul 24th 2016, 8:38 PM

    According to the article kamala doesn’t.

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    Mute Padraigh Keogh
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    Jul 24th 2016, 8:42 PM

    That’s not funny man.

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    Mute mary carey
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    Jul 24th 2016, 9:03 PM

    Actually I chuckled at it!!! Seriously tho being 410lbs – 29stone, surely contributed to the diabetes which is well known for leading to poor vascular supply and loss of limb. Was he made to be 410lbs?

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    Mute Keith Russell
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    Jul 24th 2016, 9:41 PM

    From what I heard when he had diabetes he didn’t look after himself and as a result is in a wheelchair. That claim is rubbish

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    Mute David Faulkner
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    Jul 24th 2016, 8:31 PM

    They surely know what they are signing up for. Before any wrestler gets into wwe/wwf back in the 80s and 90s they’d have worked for smaller companies. Wrestled countless matches before gaining a spot on wwe tv. It must be punishing with injuries etc happening and still opting to wrestle. You get into something like that it’s your own choice.

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    Mute glen fagan
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    Jul 24th 2016, 11:21 PM

    JJ FUNK “alleges” his eye fell out after being kicked… Does this mean that no one can prove this happened ? What did he push it back in before anyone noticed an it was still in perfect working order !

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    Mute *The* Brendan Gordon
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    Jul 25th 2016, 1:57 AM

    yeah you actually can just pop an eye back in. Look up “Vader eye” on youtube. Big Van Vader’s eye got knocked out of his skull in the middle of the match, he popped it back in and continued the match, waiting till afterwards to get medical attention. The guys do know and accept the risks, the claim is that WWE specifically scripted “no win” scenarios that werent high risk, but guaranteed damage, and knowingly mislead performers of the debilitating effects. see also CM Punk/Phil brooks. Was cleared to perform after concussion over the phone, and also was kept on antibiotics for 6 months for “an infection” by a company doctor, for what was later found to be MRSA which he was later told by an independent physician was clearly MRSA.

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    Mute Nigel Carroll
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    Jul 24th 2016, 11:23 PM

    How many times was Marty Jannetty fired for acting the eejit with drugs?

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    Mute Robert Neale
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    Jul 24th 2016, 9:00 PM

    If Paul Gosford (the author) did his research, he’d know that these claims are time-barred under Connecticut law, as they were not filed within the three year statute of limitations period pertaining to personal injury suits.
    WWE had a similar case dismissed on 21st March 2016… and most of the wrestlers involved in it were far more recent that these ones. Same law firm though.

    http://www.cagesideseats.com/wwe/2016/3/28/11319008/wwe-wins-important-rulings-in-concussion-lawsuits

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    Mute Ron
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    Jul 24th 2016, 9:16 PM

    If you had done your research, you would have spellt the author’s name correctly.

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    Mute Robert Neale
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    Jul 24th 2016, 9:20 PM

    I’m not a journalist – nor am I required to do any research. You seem to be confusing the roles here – the author does the research – we comment.

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    Mute Paul Hosford
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    Jul 24th 2016, 9:38 PM

    Hi Robert, The statute of limitations will be decided upon by a judge, but the lawsuit does address it. The lawyers reckon it’s a different case because it’s about “an illegal shifting of taxes mandated be paid by an employer, on behalf of an employee”, which is technically different to the first two cases. It’s a long shot of a case, but technically it’s a different type of case than the last ones.

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    Mute Robert Neale
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    Jul 24th 2016, 9:47 PM

    Yeah, it addresses the classic “independent contractor” issue, but it’s a huge longshot. WWE will do anything to avoid letting that decision be made by a judge – and a case like that needs to be taken up by a current employee.
    One of the performers listed in the suit, Don Leo Jonathan, last performed for the company in 1974, and was with the company for less than one year of a 30 year career. The lawsuit claims that he can no longer walk. With very few exceptions, most of the plaintiffs worked for a number of pro wrestling companies during their careers, and worked far more for other promotions other than the WWWF/WWF/WWE.
    The only names that worked the majority of their careers with WWE among the plaintiffs would be Sylvain Grenier, Marc Copani (Muhammad Hassan), Jon Heidenreich and Bobbi Billard. Also notable is that a few plaintiffs, former referees Dave and Earl Hebner and former manager Ken Johnson (Slick) did not even work as pro wrestlers.

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    Mute Fluffer TheCanary
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    Jul 24th 2016, 11:47 PM

    the time limits which apply to types of litigation seem simple on the face, but in reality if you comment about them you’ve probably not given enough consideration to

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    Mute Owen Slattery
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    Jul 24th 2016, 11:15 PM

    Some of the wrestlers listed were suspended/terminated by the WWE for violating the company’s Wellness Policy by testing positive for illegal drugs, yet are suddenly concerned with their health.

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    Mute Frederick Higginbottom
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    Jul 24th 2016, 8:40 PM

    never heard of any of them

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    Mute Norma's Stits
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    Jul 24th 2016, 9:08 PM

    Wrestling fake????!!!

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    Mute peter crew
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    Jul 25th 2016, 10:20 PM

    You know most tv is fake right

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    Mute Jimmy Murphy
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    Jul 25th 2016, 12:28 AM

    The money is running out for those former wrestlers. That’s all this is. They knew what they were getting into.

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    Mute Steve stevenage
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    Jul 24th 2016, 8:47 PM

    I wonder if they’d have sued had they gone on to have successful careers instead of being washed up “used to be”s

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    Mute Dunkel Master
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    Jul 24th 2016, 11:04 PM

    Poor oul Jimmy Snuka..

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