Why is most people's right hand better than their left?

In daily life, most people are used to working, writing, holding chopsticks, lifting things and playing ball with their right hands. According to statistics, there are about 95? 98% people are used to using their right hands. Physiology calls this phenomenon "right-handed".

The right hand is greater in strength, volume or weight than the left hand. The right hand is more developed than the left hand, and even the right leg is more developed than the left leg. So, why on earth are people used to using their right hands?

According to biological research, people are used to using their right hands, which is gradually cultivated through long-term labor. In the early Stone Age, people fought wild animals in droves with stone axes and spears. When fighting, people will instinctively bend their left hand to protect the heart on the left side of their chest, and their right hand will rush to the beast with a weapon. From the ancient Greek murals left over more than a thousand years ago, we can also see this situation: people hold spears in their right hands and shields in their left hands.

In the long years, people often use their right hands. Even sometimes children write with their left hand or eat with chopsticks, and teachers and parents always ask him to change. Gradually, the phenomenon of "right-handedness" is not only an acquired habit, but also an innate inheritance. Someone once did an experiment: put a four-month-old baby on a chair for a period of time every day. There were many toys in front of the chair. It was found that he held the toy *** 124 times with his hand, 74 times with his right hand and 50 times with his left hand. Later, the number of times the baby used his right hand gradually increased, so that when he put the toy next to his left hand, he also used his right hand to get it.

In the human body, the neural pathways leading to the brain cross halfway, that is, the right hand is managed by the left hemisphere of the brain and the left hand is managed by the right hemisphere of the brain. Because people often use the right hand, the sensitivity of the left hemisphere is slightly higher than that of the right hemisphere, which in turn urges people to use the right hand more, making the strength of the right hand gradually greater than that of the left hand.

In order to achieve balanced development as much as possible, it is necessary to pay due attention to using the left hand in sports and labor.