Healio (3/29, Herpen) reports, “Long-term cannabis users showed deficits in cognition and smaller hippocampal volume by midlife,” investigators concluded in a study involving “a representative cohort of 1,037 people born in Dunedin, New Zealand, between April 1972 and March 1973, who were followed through the age of 45 years.” Study “participants were assessed for cannabis use and dependence at ages 18, 21, 26, 32, 38 and 45, with IQ gauged at ages 7, 9, 11 and 45 years.” The study revealed that “long-term cannabis users’ IQ declined from childhood to midlife (mean = 5.5 IQ points), with resultant poorer learning and processing speed relative to their childhood IQ, as well as memory and attention problems.” The findingswere published online March 8 in the American Journal of Psychiatry, a publication of the American Psychiatric Association.
Related Links:
— “Long-term cannabis use linked to cognitive deficits, lower hippocampal volume in midlife “Robert Herpen, Healio, March 29, 2022