Our brain is like a message center. Each second, the brain receives more than a million messages from our body and knows what to do with them. The brain has two halves- the right brain and the left brain. Each half is about the same size.The right half controls the left side of the body, and the left half controls the right side of the body.
The left side of the brain controls the right side of the body, so when the left brain is stronger, the right hand will be strong and the person may be right-handed. The left half controls speaking. If something happens to the left side of the brain, the person may have problems speaking and may not know what day it is. The right side of his or her body will become weak.
When the right side of the brain is stronger, the person will have a strong left hand and may be left-handed.