Your brain can do amazing things, not least of which is change. Specifically, neurons can adapt and grow new connections to help compensate for a loss in function in other areas. This has been most dramatically shown in children who have an entire hemisphere of their brain removed, usually to treat extreme cases of epilepsy, the other side taking over so that they can still walk, talk and function normally. Another common example of this type of neural plasticity is the improvement of other senses, particularly hearing, after the loss of sight.
In my latest article for The Guardian, I review a study that reports improvements in hearing in mice that have been visually sensory deprived for a week — meaning they were locked in a darkened room. Amazingly, cells in a sensory relay-station part of the brain reorganized to strengthen their hearing after this temporary loss of sight, even in older mice, which were previously thought to be exempt from this ability. While it’s still early days, this finding opens up the possibility for less invasive ways to treat hearing loss in old age.
I’ve got a new piece in The Guardian today on memory deficits in heavy cannabis users, and how the type of weed you’re smoking can actually impact your risk for impairment. Dedicated Brain Study readers might recognize it as a revamped, beefed-up version of the infamous “Weed be better off smoking our parents’ pot” post from last year. Now, I’ve incorporated some new research into the piece on cognitive problems in heavy smokers, as well as the relevant policy news from Colorado, Washington and Uruguay regarding legalization. I also talk about how these developments could result in more than one type of harm reduction, which is an exciting prospect for improving the safety of the drug with government regulation.
Check out the full piece here, and as always, let me know what you think.
I’ve got a new piece in The Guardian today on the unfolding debacle that is Toronto Mayor Rob Ford.
His consistent pattern of bad decision-making – including death threats, drunken driving and public boasts about his sex life – have all the signs of problem drug and alcohol use. Substance-dependent individuals frequently show impairments in decision-making abilities, with difficulties in impulse control and executive function, as well as corresponding abnormalities in relevant brain regions.
However, as Mayor Ford has vehemently denied any accusations of addiction, it could just be incompetence.