Left or Right
The anatomical asymmetries of brain have been found in many animals bescides human, even honeybee. It seems the evolution prefer asymmetries for brain and heart, which are the most important organs in the body. Thare are some spliting brain cases, which are to help seisure patients, and as a side-effect, if those patients are right-handed, they are able to write words displayed to the left side of the brain, but not words displayed to the right, it ’s reasonable bacause the left side of the brain controls speaking, reading and writing in most people. And There is another case who is left-handed, when her brain was splited, she can write words displayed to the right side of her brain, but not words displayed to the left, which means the right hemisphere might control writing in left-handed people.
And interesting, when human is older than 25, the langusage center becomes blurred, with both hemisphere function rather than one domination.
