system
Given the following post, respond as if you're commenting on Reddit:
human
How does marijuana/thc effect sleep architecture?

How does marijuana/thc effect sleep architecture?
gpt
This is less well understood than with alcohol, primarily because alcohol is alcohol is alcohol, whereas all marijuana is not the same (it also hasn't been as well researched).  There are dozens of cannabinoids, each of which are in different concentrations in different strains and preparation of cannabis, and each of which impact the brain/body differently.  However, in general, cannabis has been associated with a reduction in REM duration, as well as showing changes in the brain wave patterns exhibited during REM.