Cannabis reverses aging processes in the brain
medicalxpress.com
medicalxpress.com
Directly contradicts previous reports of memory loss from extended Cannabis use.[1]
Who do you believe? It's starting to sound like those 'studies' and 'research' on coffee, eggs, wine, etc. 1 day it's good for you, another day, it kills you.
[1] Source: See the first few results from reputed sources in this search => https://www.google.com/search?q=cannabis+memory+loss
One thing that helps with biology papers is mentally substituting "performance in our mouse model of memory" for memory, they are using some very specific metric for memory in aged mice. It may be that this result doesn't hold true for a different memory metric, in different animals etc.
Also, without reading the full paper it's unclear whether THC harms this type of memory task memory in young mice, which could totally be true.
I've had a pet theory that hallucinogens have an effect on the brain analogous to database refactoring. Users commonly report the experience of mental schema breaking down and being reordered. Maybe older minds have database tables with too many columns and need psychedelic experiences to normalize their DB (ie. mental schema)?