Uncle dans leg wrote: ↑Thu Aug 15, 2019 12:19 am
Per wrote: ↑Wed Aug 14, 2019 9:49 pm
Still fucks up your brain.
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The greatest concentration of cannabinoid receptors reside in the striatum and substantia nigra, parts of the brain responsible for coordinating movement. These brain regions also deteriorate in Parkinson’s Disease, and like Parkinson’s, one of the signature effects of THC is poor motor control. That’s partly why marijuana, like alcohol, compromises driving ability. A recent study from an emergency room in Canada found that 20 percent of driver’s injured in car accidents had THC in their blood, even though, according to UN estimates, only 4 percent of the population smoked in the past year. A group of researchers asked the marijuana users about their driving habits and determined that the drivers were 4x as likely to crash when they were high compared to when they drove sober at the same time of day.
https://www.psychologytoday.com/intl/bl ... -the-brain
Cannabis lowers activity in both ACC and DLPFC clusters, and for people with normal brain function this could lead to problems in executive function and decision-making. Cannabis is likely to cause inaccuracy in error monitoring, leading to misperception and performance issues due to mistakes, and may impede function during high-conflict situations, from both errors in judgment as well as from altered decision-making and subsequent execution. Decreased DLPFC activity could lead to emotional regulatory problems as well as decreases in memory and reduced attentional control.
https://www.psychologytoday.com/intl/bl ... e-function
Now, if you mean that it does not fuck up your brain permanently, you do get the benefit of the doubt. Studies have shown damage to the white brain matter in heavy pot users, but have not been able to establish cause and effect, ie whether they have brain damage because of smoking pot, or if they more easily become addicted to smoking pot because of their brain damage. Studies have also been able to show permanent brain damage caused by THC in mice and monkeys, but it is harder to conduct that kind of studies on people, and the studies on people that have been made have a hard time discerning between what is caused by the weed and what is caused by other factors, so there is little hard evidence to permanent brain damage caused by THC, even if there is a lot of circumstantial evidence to that effect. Well, except for those that smoke in their early teens. There
is some evidence that smoking weed during your adolescence will lead to permanently lower IQ.
The research detected greater increases in errors in cognitive tests on the teenagers using cannabis - while they were taking the drug and after they had stopped.
These effects were seen in working memory, reasoning and their ability to control their behaviour.
"Their brains are still developing but cannabis is interfering with that," Prof Conrod said,
https://www.bbc.com/news/health-45732911
But the immediate effect is clear. Smoking or eating products with THC mess with your memory, your decision making ability and your motor skills. And unlike alcohol, which leaves your system within hours, THC may linger in your body for up to a week, or in heavy users several weeks. THC is also stored in your body fat, and can be re-released into your blood stream if your body burns fat due to eg fasting or exercising.
Thus it does fuck up your brain, at least short term, and it is only logical that employers do not want those that operate heavy machinery, or do other things where slower reaction/decision making, poor attention span/focus and impaired motor skills could cause dangers for others, to smoke weed.
The good news is that for those that have only used pot as adults, after three to six weeks of abstention, it is hard to notice any cognitive function impairment compared to non-users.