Brain Wired for Improv, Not Perfection
Practicing your golf swing may make it better, but it'll never make it perfect -- because the brain is wired for inconsistency.
WebMD News Archive
Dec. 20, 2006 -- Practicing your golf swing may make it better, but it'll
never make it perfect, because the brain is wired for inconsistency.
That's according to new brain-based research that suggests the reason humans
have a hard time doing the same task exactly the same way is that the brain
starts planning each movement from scratch.
The study found variations in monkeys' brain activity in the planning stages
before they performed the same task over and over again -- and that those
variations were associated with inconsistencies in their performance.
"The main reason you can't move the same way each and every time, such
as swinging a golf club, is that your brain can't plan the swing the same way
each time," says researcher Krishna Shenoy, assistant professor of
electrical engineering at Stanford University, in a news release.
In the study, published in Neuron, researchers trained monkeys two
simple reaching tasks: to reach and touch a green spot slowly, and to reach and
touch a red spot quickly.
After monitoring thousands of attempts, they found the monkeys rarely
reached with the exact same speed for either spot, and that about half the
inconsistencies in the monkeys' performance was in their heads rather than
Specifically, the study showed changes in neural activity for planning a
movement was predictive of the variations in reach speed.
The researchers say inconsistencies in how the brain plans for each movement
may have an evolutionary reason.
"The nervous system was not designed to do the same thing over and over
again," says researcher Mark Churchland, a postdoctoral student at
Stanford, in the release.
"The nervous system was designed to be flexible," Churchland says.
"You typically find yourself doing things you've never done
Of course practice can reduce the variation in the mind's and body's
But, researchers say, it can't change the variable way the mind plans