Smoking high-strength cannabis may damage nerve fibres in brain

Theguardian.com reports: Study suggests high levels of skunk use may affect the brain’s white matter, making communication between the right and left hemispheres less efficient High-strength cannabis may damage nerve fibres that handle the flow of messages across the two halves of the brain, scientists claim. Brain scans of people who regularly smoked strong skunk-like cannabis revealed subtle differences in the white matter that connects the left and right hemispheres and carries signals from one side of the brain to the other. The changes were not seen in those who never used cannabis or smoked only the less potent forms of the drug, the researchers found.  The study is thought to be the first to look at the effects of cannabis potency on brain structure, and suggests that greater use of skunk may cause more damage to the corpus callosum, making communications across the brain’s hemispheres less efficient...