Left-Handedness Loses Its Stigma but Retains Its Mystery – NYTimes.com   Leave a comment

“Hand dominance (whether left or right) is related to brain asymmetry. And that, Dr. Francks said, “is not at all understood; we’re really at the very beginning of understanding what makes the brain asymmetrical.”

Though brain asymmetries exist in our closest primate relatives, there seems to be general consensus that the human brain is more profoundly asymmetric, and that understanding that asymmetry will show us much about who we are and how our brains work.

Brain lateralization, the distribution of function into right and left hemispheres, is crucial for understanding language, thought memory and perhaps even creativity. For many years, handedness has been seen as a possible proxy, an external clue to the balance in the brain between left and right.

For right-handed people, language activity is predominantly on the left side. Many left-handers also have left-side language dominance, but a significant number have language either more evenly distributed in both hemispheres or else predominantly on the right side of the brain.

via Left-Handedness Loses Its Stigma but Retains Its Mystery – NYTimes.com.

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Posted March 29, 2012 by arnoneumann in Science

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