Long-term cannabis users showed deficits in cognition and smaller hippocampal volume by midlife, according to results of a New Zealand study published in the American Journal of Psychiatry.
“It is unclear whether the subtle cognitive and brain differences observed in young cannabis users might be larger in midlife and older adult cannabis users with longer histories of use,” Madeline H. Meier, PhD, of the department of psychology at Arizona State University, and colleagues wrote.
Meier and colleagues wanted to see if long-term cannabis use is associated with cognitive deficits and