As the spirit of all things, there is a pair of other creatures that cannot match smart hands, but each person is not the same for the use probability of both hands. Most people are accustomed to using the right hand, only a few people have prejudice to the left hand. To this end, a wide range of investigations were conducted in the 1970s, and 10% of human beings were found to be left-handed, and this interesting physiological phenomenon is limited to human beings. There is no existence on the animal, even in primate, the probability of the left front limbs and right precursor is almost equal, even in a primate with the closestone of the human affinity. So, is it a left-handed or right-handed person to accommodate human survival? Who is smarter? For a long time, this unsuccessful mystery has always been confused by scientists. As early as more than one century, people think that left-handed is an abnormal physiological phenomenon, and even regard it as a disease. Those this is due to the maternal encounter, the brain of the baby (with the right hand and the text and language function) are damaged. Make the baby often use the left hand during the later growth, and therefore, the left-handed person is often accompanied by a phenomenon that has a dull intelligence. But the fact that the situation is not completely, many of us around us do not have a dull intelligence, but they are more intellectual, especially in their careers that need to be imagination and space, the left-handers are many The best talent. To this end, a group of American physiologists conducted research on the American Institute of Architecture. The survey found that 29% of the entire college are left-handed, and in the outstanding students who should take the doctoral or master's degree, left-handers account for twenty three%. In addition, several French experts engaged in neurophysi studies have traveled similar investigations in excellent athletes. They found that three of the four best tennis players in the world are left-handed, and 15 male and female players in French fencing team. There are 8 left-handed players. Why is left-handed people with natural agility? To answer this is interested in problems, only from the perspective of neurophysiological mechanisms. Modern anatomy has already told us that the human brain has two hemispheres, and their functions have a division, the brain's left hemisphere accounts for the main status of all symbolic functions. It is "responsible" reasoning, logic and language, work method is The analysis, such as the electronic calculation center, is processed. The brain right hemisphere is focusing on the feeling of geometric shapes, "responsible" feelings, imagination and spatial distance, which has the function of judging the visual signal. Therefore, from the brain of "watching things", the neuronic response pathway of left-handed and right-workers is different. The right right must take the route of the "big brain right hemisphere ---- brain left hemisphere ---- right hand". And left-handed is always a route of "Big Brain Right Hemisphere ---- Left Hand". Obviously, from "see" to "moving", the left-handed person should be less than a bend, according to such an explanation, the left-handed child is very reasonable than the right-handed personality in action agility. Since the scientists put forward the left-hander than the right-handed discussion, many experiments made people believe. The active sensitivity of the left-handed central nervous system is really much stronger than the right. It can be confused. Since the left-handedness has this obvious superiority, then in our human world, why is most people (90% of the population) are right-handed? In the early 1980s, a scientist of the State University of New York, Peter Owen, made an original insight for this phenomenon. He believes that in the process of natural evolution, if the left-handed man and the right-handed man are obviously worse than the ability of the left-handed man's ability to adapt the environment.
