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KIDS ASK about handedness

Q. Why are more people righthanded than lefthanded?

A. Experts believe that being righthanded or lefthanded is handed down through the genes. Up to about 12 years old, a person can be trained to use either hand. Doctors have discovered that most people have a greater number of nerves going to one side of the brain, usually the right. They also know that which hand you favor is related to the way the brain is divided. The right side of the brain controls the left side of the body, and vice versa. When people are righthanded, their speech center is usually found in the left side of the brain. And in 70 percent of left-handed people, the speech center is on the right side.

BY Linda K. Harris, Knight-Ridder Newspapers

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