Learning is good for you, right? Absolutely: and new research suggests that it actually helps your brain to grow.
Recent research at the
Axons are the long, slender projections of neurons. They make contact with other brain cells – usually other neurons – by sending electrical impulses to the synapses, which act as junctions between brain cells.
You might expect learning to strengthen those connections. Until now, however, research has tended to concentrate on the grey matter of the brain: the neurons themselves. The new work has actually seen the growth in white matter for the first time.
Jan Scholz and his colleagues work at the snappily titled Oxford Centre for Functional Magnetic Resonance Imaging of the Brain (FMRIB). They asked 24 young men and women to
learn juggling, practicing for half an hour a day over six weeks. Before and after this training period, the
researchers scanned the brains of the jugglers – together with those of 24
people who didn't do any juggling.
They found that, while there was no change in the non-jugglers' brains, the jugglers grew more white matter in a part of the parietal lobe - the part of the brain involved in connecting what we see with how we move.
One heartening finding is that it’s the learning that matters, not how good you become. White matter grew by the same amount in all the jugglers, no matter how good they got. So it's probably the learning process itself that is important for brain development, not how good you are.
An even cheerier result is that the changes seem to be permanent. When the researchers scanned the jugglers' brains again, after four weeks without juggling, they found that the new white matter had stayed put. What’s more, the amount of grey matter had even increased.
"It's like riding a bike," Scholz says. "Either
you can juggle or you can't. It takes a lot of training to learn, but once it
clicks, you don't forget it."
‘We tend to think of the brain as being static, or even beginning to degenerate, once we reach adulthood,’ says Dr Heidi Johansen-Berg of the Department of Clinical Neurology, University of Oxford, who led the work. ‘In fact we find the structure of the brain is ripe for change. We’ve shown that it is possible for the brain to condition its own wiring system to operate more efficiently.’
The brain wants to learn, it seems.
Arne May of the University Medical Centre
Read the full story in New Scientist here.