Casual marijuana use linked to brain changes

-this just in...a scientist has shown that even thinking about marijuana will be a detriment to your brains development
and will also make you grow a second butthole and make you rape animals. This kind of scare tactic is getting extremely resixulous. They are obviously grasping at straws.
 
Then you should apply to be an anti-drugs journalist at once.

Professor Nutt the ex-chief adviser on drugs to the government in the UK, it says he was sacked for his views, his comment at the end about alcohol being a proven neurotoxin was good. Does anyone know much else about him?
 
I thought the following quote is kinda pertinant to this discussion, from Creating the American Junkie: Addiction Research in the Classic Era of Narcotic Control, The John Hopkins University Press, by Caroline Jean Acker:

Page 65 said:
As Timothy Lenoir has argued, science is a cultural activity linked "in a seamless web" with social and political concerns and practices. The Committee on Drug Addiction's structural links to the federal drug policy bureaucracy, to university research departments, to the American Medical Association, and to the pharmaceutical industry, as well as the influences these groups exerted on the scientific research overseen by the committee, illustrate just how science is embedded in and part of a larger social world. A network of overlapping groups agreed on drug development as a useful approach to solving the social problem of addiction, creating a mosaic of interests within which each group achieved specific internal gains while offering support to a larger effort.

The parties involved included academic chemists and pharmacologists, philanthropies and social reformers, organized medicine as represented by the AMA, pharmaceutical firms, clinicians, public health officials, and law enforcement officials. A research problem that was compelling to all of these constituencies had the ingredients to secure durable funding and maintain long-term research interest. The quest for a nonaddicting analgesic thus functioned as a "boundary object" in the sense portrayed by Susan Leigh Star and James Griesemer. The project represented a meaningful objective for all the participating groups and thus provided a focus for coalition and collaboration. At the same time, it embodied different kinds of interests and different internal meanings within each group, so that each could pursue its distinct aims, while remaining allied in pursuit of the shared objective.
[Paragraphs & larger font added to increase readability]

A bit of unrelated stuff in there, but I thought it might be good to include everything to make sure the significance of this quote to the discussion at hand is clear. That being, that the idea of "pure science" does not exist outside myth. Science operates within social circumstances, conducted according to political, social, cultural, medical and/or religious influences. Science for the sake of purely science does not exist in this world, nor could it really. Perhaps it could, but it would be incredibly difficult to create.
 
I figured that this deserved a second look.

"Just casual use appears to create changes in the brain in areas you don't want to change," said Hans Breiter, a psychiatrist and mathematician at the Northwestern University Feinberg School of Medicine in Chicago, who led the new study.

I will refrain from being terrified, until this world class scientific statement is explained to us and its explanation backed up. So I guess i would need to see the negative outcomes, of the claimed resultant change, before I was on board with Breiter conclusion.

The study found volume, shape and density changes in two crucial brain areas — the nucleus accumbens and the amygdala — involved with emotion and motivation and some types of mental illness. "This is a part of the brain you do not want to mess around with," Breiter said.

The more marijuana the students smoked, the more their brains differed from the non-users, the study found.

The brain continues to develop well into the 20s, and even into the 30s, said Breiter, who is concerned about the long-term impacts of marijuana use on the developing brain.

Since increases in the size of the amygdala have been pretty clearly linked to stimulant use and if the use of such substances by person with a developing brain so detrimental, then why are so many young children, some as young as four years old so commonly given amphetamines and methylphenidate. Seems to me that if this was such an awful side effect we would never consider dosing young children daily, for years and years, during periods when there brains are supposedly most vulnerable possible effects.

Responding to a study that found a decline in IQ points among people who used marijuana regularly, Francis Collins, the director of the National Institutes of Health, told USA TODAY recently that people should be more aware of these potential brain impacts.

You have an IQ of 120
Your IQ score lies within a range of 121 up to 137.
Your IQ is 130
You have an IQ of 136
Your IQ score is 128

I dont put much stock in IQ but i just wasted my time and took seven different online IQ tests, but I got scammed on two because they wanted me to pay for my "free" results. at the end.

The results kinda make me wonder where all the brain damage from the drugs is.
 
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^ IQ is a very flawed measure of - something, though it is not what I (or many) would call intelligence.
It is entirely culturally-bound, and measures some specific knowledge and patterns of cognition that are deemed to be useful to society.
(That said, pretty good IQ there, NSA! The fact that the 5 test results are so close is pretty surprising,and actually speaks to the reliability of the tests in measuring… whatever it is they measure.)
 
Marijuana is a mind and mood altering substance. Of course it alters the brain.
 
Correlation does not equal causation, and a single exam cannot show a trend over time. Basic stuff, right?

But judging by coverage of a study just out in the Journal of Neuroscience, these are apparently foreign concepts for many folks in the media.

In the study, researchers at Boston's Massachusetts General Hospital and Northwestern University in Chicago performed MRI brain scans on 20 young adult "casual" marijuana users and 20 age- and sex-matched nonusers. They found that, in the users, gray matter densities in the nucleus accumbens were higher than in controls, and the right amygdala and left nucleus accumbens were shaped differently.

Interesting, but remember that these findings only reflected differences between the marijuana users and controls at a single point in time. The researchers did not, could not, demonstrate that the differences resulted from marijuana smoking or even that the "abnormalities" relative to controls reflected changes from some earlier state.

http://www.medpagetoday.com/Neurolo...=breaking-news&xid=NL_breakingnews_2014-04-16
 
So smoking weed apparently causes long-lasting changes in certain areas of the brain.

I'm willing to bet that alcoholic beverages cause more severe long-lasting changes in more areas of the brain when compared to Cannabis sativa and/or delta-9-THC. But wait - let's say this is actually the case... Why don't I ever read about it in mainstream media (or at least the same media that covers this shit)? Ethanol has been shown to be neurotoxic, has it not? Why no media coverage? Zzzzzzzzzzzzzzzzzzzzzz.
 
When I read this study I immediately wanted comparisons to put it in context. I have no doubt that changes could take place but as others have stated, what else causes changes to take place (TV, Computer screens, alcohol, etc) and what do those changes signify?

The study was very small, did not make clear whether the non-mj-using students were using anything at all (alcohol). I would be more interested to see a comparative study since alcohol abuse is so much more of a problem with teens.

This study amounts to a conveniently eye-catching headline and nothing more.
 
Since it's been requested, here are a couple of other things that have been studied in relation to amygdala size:

Anxiety

Social Network Size

I haven't looked too closely at these so I'm not sure how appropriate the comparison is, but I think they're worth mentioning anyway.
 
I am not saying this study wasn't ridiculously small and quite possibly flawed but I have to say that it seems very very believable to me that pot might inhibit SOME people from truly reaching their true potential because it affects intelligence and motivation
- to me smoking pot effectively "dumbs" a person down and that is why I never enjoyed it so when that is the effect it stands to reason that after regular use there is a bit of a lingering "dumbing" effect
 
I am not saying this study wasn't ridiculously small and quite possibly flawed but I have to say that it seems very very believable to me that pot might inhibit SOME people from truly reaching their true potential because it affects intelligence and motivation
- to me smoking pot effectively "dumbs" a person down and that is why I never enjoyed it so when that is the effect it stands to reason that after regular use there is a bit of a lingering "dumbing" effect

That is rubbish. I'd like to refute & dispute that statement. I am a perfectly productive member of society thank you very much. I have smoked herbal marijuana/cannabis all my adult life, daily, & it has not inhibited my ambition or ability to succeed in that to which I apply myself. I have run a small business of my own for 20 years, I have produced tons of music stoned, run record labels & studios, I have DJ'd in various places around the world. Alcohol has brought all the symptoms you describ above however, as well as many other health problems & is in my opinion far, far, far more deleterious to oneself & society at large than marijuana/cannabis could ever be.

If any long term effect of my drugs use is apparent, it is in my total disinterest in the global passion for amassing wealth, acquiring property or the pursuit of happiness through fame or wealth. Using psychedelic drugs including herb has taught me that earning money for the sake of hoarding it is pointless & that true spiritual value is highly underrated in our world. I find worth in free time, in smiling at strangers in the street, making music. Not in my bank balance. As such I have no savings, own no house & no car & I spend what little money I can get on good food, music, travel & other such things that broaden my mind, not tie me down.

I don't like to describe myself as clever or anything, but I am certainly alot fucking smarter as a 45 year old than I was at 20 when I started smoking weed daily. How does that compute, exactly? By the above estimation, I should be well fucking thick by now!
 
^ Nice post, and I must say that it seems like you are I are quite similar in our outlooks, S.I.

I have smoked cannabis throughout most of my adult life, and managed to get through years of grad school, hold a job in the world of academia, while loving and embracing both the research and the teaching, play and listen to tons of music, write more than 250 poems, exercise incessantly, and - most importantly - I have had lots of free time to spend with my family, especially my children.

If there is a lingering "dumbing" effect from smoking weed, I may have needed this effect to "only" be smart enough to get my PhD in a social science.
Otherwise, I am sure I would have gotten several nobel prizes by now….
 
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