https://www.ncbi.nlm.nih.gov/pubmed/27549374
https://www.psychologytoday.com/us/blog/experimentations/201801/neuroimaging-cannabis-and-brain-performance-function
Exactly.
The more authoritative NIH study linked in post 17 (a survey of 103 peer-reviewed studies), shows the opposite of what the California study proposes (through the use of many weasel word qualifiers). When you get on PubMed and start surfing the research literature, brain changes, neurotransmitter changes and psychological changes from Marijuana use are widely supported by evidence.
From the study at Post 17 https://www.ncbi.nlm.nih.gov/pubmed/27549374:
- Regular cannabis use has been associated with a range of acute and chronic mental health problems, such as anxiety, depression, psychotic symptoms and neurocognitive impairments.
- Regular use of cannabis results in volumetric, gray matter and white matter structural changes in the brain, in particular in the hippocampus and the amygdala.
- Regular use of cannabis affects cognitive processes such as attention, memory, inhibitory control, decision-making, emotional processing, social cognition and their associated brain areas.
- There is evidence that regular cannabis use leads to altered neural function during attention and working memory.
- Similar to other drugs of abuse, cannabis cues activated areas in the reward pathway.
- Regular cannabis use resulted in reduced dopamine transporter occupancy and reduced dopamine synthesis.
- In conclusion, regular use of the cannabinoids exerts structural and functional changes in the human brain.
Don’t kid yourself.