Cannabis users' brains can repair themselves: study
By Meredith Griffiths
Study: long-term cannabis users surprisingly performed better at some tasks than newer users.
Study: long-term cannabis users surprisingly performed better at some tasks than newer users. (Reuters: Robert Galbraith)
New research shows how the brains of chronic cannabis users become less efficient than the brains of people who do not use the drug.
The University of Wollongong study also shows that over time the drug users' brains adapt and almost come back up to speed.
But experts say the study shows more evidence that cannabis should not be regarded as a soft drug.
The study shows the main psycho-active ingredient in cannabis, THC, lingers in the body for weeks, meaning that the brains of frequent users could be constantly exposed to the chemical.
University of Wollongong clinical psychologist Robert Battista says lingering effects of THC mean users' brains have to work harder to do the same tasks as people who do not use cannabis
"It is kind of like if you are driving your car down a freeway and the freeway is the most efficient neural pathway ...
the road has potholes or there is fog so that it is more effortful, more resources have to go into doing that same task," he said.
http://www.abc.net.au/news/stories/2010/06/11/2924432.htm