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Casual Marijuana Use Causes Brain Damage

Discussions related to the physiological and psychological effects of peak oil on our members and future generations.

Re: Harvard study: casual marijuana use causes brain damage

Unread postby Plantagenet » Wed 06 Sep 2017, 02:44:28

Thanks MMasters.

I appreciate your thoughtful comments on this topic.

I must note that the new research showing the harmful effects of marijuana is not only being done in the USA, where the schedule 1-schedule 2 issue you note exists, but in countries all around the world. They all keep coming up similar results----marijuana causes significant changes in brain physiology, i.e. brain damage. There are also numerous additional medical issues that are being documented in study after study.

I'm glad that marijuana is such a valued part of your life. Much of the new research on medical problems associated with marijuana use shows that it is particularly dangerous for teenagers, so you likely don't have much to worry about.

As far as my trying marijuana, I tried it a few times long ago in high school. Didn't do much for me, but then I'm one of those hyper-rational scientist types with little interest in getting drunk or stoned.

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Re: Harvard study: casual marijuana use causes brain damage

Unread postby Plantagenet » Wed 06 Sep 2017, 17:29:04

New study finds that pot smoking by adolescents does NOT lower their IQs. The new study finds that the teenagers who tend to smoke pot are the ones with low IQs to start with, so their lower IQ scores cannot be blamed on pot.

Marijuana-use-does-NOT-affect-teenager-s-IQ-pot-smokers-ALREADY-have-low-IQs

This study contradicts prior studies that showed that pot smoking lowered IQs, grades, motivation, etc. in teenagers.

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The good news is that pot smoking won't lower IQ in teens.
The bad news is that chances are teens who smoke pot already have a low IQ.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby SeaGypsy » Wed 06 Sep 2017, 17:55:24

That's funny, mine was in the top 1% when I started smoking pot in my teens. I haven't tested since.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby Plantagenet » Wed 06 Sep 2017, 18:55:02

$this->bbcode_second_pass_quote('SeaGypsy', 'T')hat's funny, mine was in the top 1% when I started smoking pot in my teens. I haven't tested since.


Yes, it seemed like an odd finding to me as well.

Ivy League Schools and other restrictive Universities usually have a "tolerance" policy towards pot---and there definitely are a lot of very talented kids with high IQs who use pot at the top Universities in the USA.

On the other hand, the nature of these longitudinal studies is to try to get a large enough population in the study so the results are statistically significant. The whole idea is not to look at just one super smart person who smokes pot or one group of kids but to get a big, robust cohort of data to work with.

The ASU study seems to have been based on over a thousand pairs of twins (!!!!), I assume so they could try to control for genetic and similar factors that affect IQ. Apparently if one twin smoke pot and one doesn't, then the pot smoker has a lower IQ. But, according to ASU that twin started out with a lower IQ.

I have two concerns.

(1) since the whole point of studying twins is to start with everything equal, including IQ, the whole study premise was flawed if they started with twins with dissimilar IQs.

(2) the news reports says that some IQs that DID fall during the study but that might have been due to other factors than marijuana. But again, the premise of the twin study is that EVERYTHING IS THE SAME so there is no reason to discount any of the data showing falling IQs.

CHEERS!

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Where would you even find 1000+ twins with one who smokes pot while the second twin doesn't? Don't most twins share most activities and turn out pretty much the same?
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby SeaGypsy » Wed 06 Sep 2017, 19:10:53

My wife is an identical twin, raised in a different household to her sister. They are instantly distinguishable, totally different mannerisms, facial expressions, confidence levels. Neither drink or do drugs, so not much use for this topic. I've suggested they volunteer for twin studies, so far both are too busy with young kids.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby Plantagenet » Thu 05 Oct 2017, 03:10:23

New research study shows that smoking pot makes people more likely to be violent

Smoking-cannabis-DOES-make-people-violent

Smoking pot makes people more likely to commit rapes, assaults, and other violent crimes, according to new scientific research.

The study in the journal Frontiers in Psychiatry.... pointed to ‘significant findings regarding the adverse effects of cannabis use on violence’.
It found there was a ‘more constant relationship’ between cannabis and violence than between alcohol or cocaine use and violence. The researchers said the link between cannabis and violence was not two-way but ‘uni-directional’.
Contrary to claims that violent people were drawn to use cannabis, researchers found ‘it was cannabis use that predicted future violent behaviour’.

Kathy Gyngell, a fellow of the Centre for Policy Studies think-tank, welcomed the ‘definitive study’ and called for official action. ‘Government has been seriously negligent,’ she said.
‘Where is the public health campaign on the risks of cannabis? If ministers had any sense they would know that we cannot afford this public health and safety crisis.
‘It must lead the Government to review their community care policy for such potentially violent individuals to better protect the public.’


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Re: Harvard study: casual marijuana use causes brain damage

Unread postby SeaGypsy » Thu 05 Oct 2017, 03:31:50

As usual with this stuff, it's bullshit-

"Violent incidents monitored by the study based on the lives of more than 1,100 American psychiatric patients included assaults, attacks with weapons and rapes."

That is NOT science. If there was any reality to these claims, they would be able to be shown through real scientific process. Nope, endless pseudo scientific crapola.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby asg70 » Thu 05 Oct 2017, 11:52:46

$this->bbcode_second_pass_quote('pstarr', 'A')bsence of THC (a naturally occurring brain-stem alkaloid) in individuals has been positively correlated with incidents of Narcissistic Personality Disorder (NPD)


Then what's your excuse?

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Re: Harvard study: casual marijuana use causes brain damage

Unread postby Plantagenet » Thu 05 Oct 2017, 12:04:14

$this->bbcode_second_pass_quote('SeaGypsy', 'A')s usual with this stuff, it's bullshit-

"Violent incidents monitored by the study based on the lives of more than 1,100 American psychiatric patients included assaults, attacks with weapons and rapes."

That is NOT science.


??????

Actually, it is science.

Medical Science is science, and Psychiatry is scientifically based mental health treatment.

The MDs and scientists who did this research work at scientific and psychiatric institutes, and this new scientific research was peer reviewed and published in a scientific journal.

Its a fact that an outsize number of violent criminals and mass murderers are potheads. The guy who shot up the grade school in Connecticut, for example.

This research looked at a sample population of people in the mental health system, and found that the pot smokers in their study group tend to be violent criminals---so much so that smoking pot was determined to be MAKING them violent.

Pot affects different people in different ways---for you it may be relaxing. But it causes some people to engage in violent criminal behavior.

Those are indeed the scientific facts, based on the latest scientific research.

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Re: Harvard study: casual marijuana use causes brain damage

Unread postby SeaGypsy » Thu 05 Oct 2017, 15:46:21

Scientific study which can give weight to generalised statements: "Marijuana causes violence!" Have to be based on reality- the general population- not on a miniscule subset- people in insane asylums. That is pure bullshit. I thought your mind was better Plant.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby KaiserJeep » Thu 05 Oct 2017, 16:18:01

Personally, I don't care whether pot causes brain damage or not. I smoked enough of it in my college days to be familiar with the effects on the mind. But I quit smoking pot because of the effects on the lungs and general health.

I'm not suggesting that we hold a prolonged thread like this one, debating whether or not pot damages the respiratory system or the brain. The type of large scale study that finally proved how dangerous tobacco was can only be held when pot is legal in the whole country, and one can distinguish the risks of inhaling marijuana smoke independent of other environmental factors in the air. There are lots of smaller preliminary studies, and the results of these are all over the map, everything from it makes no difference to being a very great deal more damaging than tobacco. If you have a mind not clouded by pro-pot or anti-pot prejudices, that is the truth of the matter - nobody knows for sure.

Then there are the plethora of pot products that one consumes as liquids or solids. Those need their own studies, before the safety of such products can be determined. Yet these products have been studied so little, and those few studies were not performed with scientific rigor, and the verdict is even more in doubt.

My personal feelings are that if one aspires to a simple lifestyle and simple diet, that pot, alcohol, or other drugs need play no part in your life.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby SeaGypsy » Thu 05 Oct 2017, 17:22:53

I'm 50, I have smoked pot off & on about half of the last 35 years. I can swim 50 meters under water on one breath, hold down a very physical job, go to gym & pool almost daily after work, have healthy relationships.

I've seen up close examples of chronic pot use, sometimes pretty bad, but nothing compared to the damage of alcohol & ciggies.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby Plantagenet » Thu 05 Oct 2017, 17:34:06

$this->bbcode_second_pass_quote('KaiserJeep', ' ')The type of large scale study that finally proved how dangerous tobacco was can only be held when pot is legal in the whole country, and one can distinguish the risks of inhaling marijuana smoke independent of other environmental factors in the air.


Actually very large scale studies on a country-wide basis have already been done in Europe. The result was the same as the other modern studies of pot---it causes higher rates of brain damage and schizophrenia then seen in the general population, lowers IQ, etc. etc.


$this->bbcode_second_pass_quote('KaiserJeep', '.')... the truth of the matter - nobody knows for sure.


You need to look at the entire body of scientific research. You are talking about the epidemiological studies where large populations of users and non-users are studied to find statistically significant effects---and that work has been done. But there is another approach to evaluating the medical effects of pot and that is to use modern imaging and bio-chemical techniques to directly measure and quantify what the effect of pot is---and these studies find that (1) pot is causing the hypothalamus, the grey cells, and other parts to the brain to shrink, and (2) pot is altering the biochemical responsiveness of key receptors in the brain



$this->bbcode_second_pass_quote('KaiserJeep', 'M')y personal feelings are that if one aspires to a simple lifestyle and simple diet, that pot, alcohol, or other drugs need play no part in your life.


I agree in theory, but I'm not that much of an ascetic. I drink nice wines with dinner and I drink beer at the weekly "beer run" a brew pub sponsors here. I don't care if people use pot or not, as long as they obey the law and don't drive stoned or go out and start assaulting people.

I do find it very interesting the way recent scientific research on Marijuana is mostly rejected by pot smokers, who absolutely refuse to accept what the science is saying if it says anything negative about pot. If they were objective and clear-headed they would acknowledge that drugs just about always have unwanted and sometimes dangerous side effects, and pot is a drug. Then the next step is to admit that Pot is just another drug with dangerous side effects. It does seem to have some medical benefits, but the side effects are a real downer.

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Re: Harvard study: casual marijuana use causes brain damage

Unread postby KaiserJeep » Thu 05 Oct 2017, 17:58:51

$this->bbcode_second_pass_quote('SeaGypsy', 'I')'m 50, I have smoked pot off & on about half of the last 35 years. I can swim 50 meters under water on one breath, hold down a very physical job, go to gym & pool almost daily after work, have healthy relationships.

I've seen up close examples of chronic pot use, sometimes pretty bad, but nothing compared to the damage of alcohol & ciggies.


OK, so we have your one anecdote. Add another 999,999 and we'll have a statisticly significant sample. You might be one extreme, and the unfortunate who smokes for less than a year and dies of lung cancer or emphyzema is the other extreme. My point would be that you are indulging in a behavior that has an unknown level of risk, and for all you know, that risk is cumulative as it is with smoking tobacco or mining coal.

That is the difference between anecdotal evidence and scientific evidence. Your personal feelings and beliefs about the consumption of the substance being consumed, be that pot or red wine or canola oil or eucalyptus oil breath mints, does not enter into the evaluation of the evidence. The difference being that the scientific study - once results are evaluated and cross-checked with other studies, by impartial scientists, or even (with something as controversial as pot) with double blind investigation - has validity, whereas your personal feelings and beliefs about pot are completely meaningless.

I didn't select those words to be cruel or thoughtless. It is important that you understand the principle being discussed. Most people including you probably do understand that almost everything that humans do, including driving vehicles on the road, possesses a degree of risk. That you - a person who makes a living doing that very thing, the most dangerous activity that the average human is exposed to - also consumes pot, does not surprise me. You probably own and use a cell phone - another activity that I refuse to indulge in, because several family members have suffered cancers. Because you see, I am risk averse and you are not.

If it makes you feel any better, I too let it all hang out upon occasion. My idea of fun is to find the most intense and the most dangerous trail I can find, and drive a modified Jeep over it. My buddies and myself have the habit of toasting the trip at the last meal, and the toast is "Survived another one". That toast was far more poignant last time, because a buddy who had gone with me for 35+ years, first hiking and then Jeeping, had died from cancer, and he and I were the only group members who had not missed camping in 30+ years.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby SeaGypsy » Thu 05 Oct 2017, 18:06:34

My anecdotes are no less significant than 1100 lunatics.
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Re: Harvard study: casual marijuana use causes brain damage

Unread postby KaiserJeep » Thu 05 Oct 2017, 18:10:23

$this->bbcode_second_pass_quote('SeaGypsy', 'M')y anecdotes are no less significant than 1100 lunatics.


I'll give that one the consideration it deserves. :-D
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