Originally Posted by Nosu3
I don't care much if it's legalized unless it's on the basis of misinformation, which the majority of that picture is. Studies have shown cannabis to damage brain cells and neurons. Even though it's considered a "safe" drug, it can cause or trigger early onset of many mental illnesses even after the first use.
Yep misinformation bad!
Studies have not
shown cannabis to damage brain cells and neurons, and there has never been a causal link shown between cannabis use and the onset of mental illness. There is some evidence that children as young as 12 who use cannabis are slightly more likely to suffer mental illness, but there has never been any causal link established. While it seems reasonable to assume that a psychoactive drug might harm a child's mind it seems even more reasonable to assume that a 12 year old who is smoking pot, already has problems.
Studies in which monkeys were given 100 times the human dose failed to cause any structural impairment of the brain. As a result of these studies, it is concluded that the claim that marijuana causes physiological damage to brain cells is incorrect. (Morgan & Zimmer, 1995).
In a study of rhesus monkeys, subjects were exposed to the equivalent of 4-5 joints per day through face-mask inhalation for an entire year, seven months later there was no observed change in hippocampal structure, cell size, cell number, or synaptic configuration (Slikker et. al, 1991).
“frequent marijuana use does not produce clinically apparent MRI abnormalities or detectable global or regional changes in brain tissue volumes of gray or white matter, or both combined” (Block et. al 1999) .
Block, R.I., O’Leary, D. S., Ehrhardt, J. C., Augustinack, J.C., Ghoneim, M.M., Arndt, S., & Hall, J.A. (1999). Effects of frequent marijuana
use on brain tissue volume and composition. NeuroReport, 11
Morgan, J. P. & Zimmer, L. (1995). Exposing marijuana myths: a review
of the scientific evidence. Open Society Institute
Slikker, W., et al. (1991) Chronic Marijuana Smoke Exposure in the Rhesus Monkey. Fundamental and Applied Toxicology 17: