Why Are some People Left Handed?

Most people in the world do their work with their right hands but four percent in the world population is left handed. In history, great geniuses in the world like Leonardoda Vinci. Micheloangelo and Madame Curie were 'lefties'.

parents of left handed children make an effort to convert it but physologists are of the opinion that this sholud not be forced otherwise they may loose their celebral balance. Such children may also turn into idiots.

Now the question arises: why are some people left handed? If we examine the constitution of the body we will notice there is a little asymmetry between the left and right parts of the body. In general, the right side of the body is slightly heavier than the left side. Our brain is also divided into right and left cerebral hemisphere. Usually, the left hemisphere is predominant over the right half. In such cases, nerves from the brain cross over at the level of the neck and go to the right side of the body. Such people are right handed. But in minor cases the right cerebral hemisphere is predominant over the left half, then the nerves coming out of the brain pass on to the left part of the body and such people are 'lefties'.