MSimon wrote:ladajo,
If pot trashes brains why does the body make so many endocannabinoids? Especially between ages 15 to 25. Is your body trying to trash itself? I'm sure with your great medical knowledge you will have a very clear explanation.
"Frequent use of cannabis, especially in adolescence, is associated with the
development of schizophrenia, a chronic neurodevelopmental disorder. During adolescence, when schizophrenia typically presents, profound changes occur in the brain, often through synaptic pruning, a process that endocannabinoids help regulate.72 Using cannabis i
nterferes with adolescent neurodevelopment, and imaging studies associate marijuana use with
adverse development of the hippocampus and the cerebellum.73–75 Epidemiologic data associate heavy adolescent use of marijuana with
both an earlier onset of schizophrenia and a 2-fold increased risk of developing schizophrenia.76 To be clear, the use of cannabis in adolescence does not cause schizophrenia but
increases the risk of its onset, suggesting interplay between marijuana use and genetic predisposition for schizophrenia.77 For people who develop schizophrenia, ongoing use of marijuana is associated with
more severe psychosis and
impaired performance on tests of attention and impulsivity.78, 79 Marijuana is a psychoactive substance whose psychiatric complications are known to increase with early onset and regular use.
Cannabis use is associated with
impairments in memory and cognition. Heavy cannabis users have
deficits in the encoding, storage, and retrieval of memory.80 A recent animal model found that cannabis impairs working memory by activating astroglial cannaboid receptors in the hip- pocampus.81 These findings correlate well with the association between heavy marijuana use and
bilateral volume reduction of structures involved in memory like the amygdala and hippocampus.82 Marijuana users often
perform poorly on tests of executive function, information processing, and visuospatial perception.83
The use of cannabis is more modestly associated with
depression and suicide in epidemiologic data. Frequent cannabis use is significantly associated with depressive disorders in bothanimal models and epidemiologic studies.84 Hyperactivity of the endocannabinoid system is associated with
impulsivity and suicidality, which is borne out in epidemiologic studies where a significant association is observed between marijuana use and
suicidal ideation and attempt.85
Finally, cannabis is the most commonly used and abused illicit substance in the world. In the United States each year, approximately 6500 individuals begin to use marijuana daily, of whom
10–20% will develop cannabis dependence.86, 87 Among people admitted to substance treatment facilities in the United States, marijuana is the most frequently identified illicit substance.88"
"Courage is not just a virtue, but the form of every virtue at the testing point." C. S. Lewis