Why ambidexters good command of both hands, and whether this study

Almost 90% of the people is dominantThe left brain knows what the right hand is doing right hand, in the other - the left. Only about 1% of the population - ambidexters. They are equally well perform all the tasks with both hands.

There are people who are changing hands for different tasks. For example, write the right, but the ball is thrown left. This is called a mixed prevalence of hand. It often occurs when you play the musical instruments. For example, guitarists, pianists and percussionists successfully used in the process of playing with both hands. Only each of them trained on the different actions.

These people do not ambidexters. They will still be difficult to write, or have non-dominant hand. In ambidexterity is no such difficulties: it is equally easy to hammer a nail, brush your teeth or beat a tennis ball and the right and left hand.

What explains ambidexterity

So far, scientists know little about the causes of ambidexterity and generally about why driving becomes one or the other hand. But studies have shown

Handedness and hemispheric language dominance in healthy humans Relation between preference and hand asymmetry of the cerebral hemispheres.

Left and right hemispheres are connectedLateralization of functions in the vertebrate brain: a review with different mental functions. This separation of tasks helps the brain to save energy and process information faster. We can not say that the left hemisphere is responsible for logic, and the right for creativity: it is too gross simplificationAn Evaluation of the Left-Brain vs. Right-Brain Hypothesis with Resting State Functional Connectivity Magnetic Resonance Imaging. Nevertheless hemisphere are not symmetrical in structure and function.

In the development of the body in one of the hemispheres formed speech centers. More often - on the left. And it also is responsible for the right extremities.

Therefore, there is a theory that explains the number of right-handers from an evolutionary perspective. According to it, the left hemisphere was leading because of the importance language skillsFor which it is "responsible". It also controls the right hand, so most people have become right-handed. Among the other primates, the predominance of the right hand is not as common. Some individuals preferComparative and Familial Analysis of Handedness in Great Apes to use it, but it does not cover the entire population.

However, this theory is not complete. Many animals, including miceAn assessment of handedness in mice, frogs'Handedness' in the Pacific tree frog and fishHanded Foraging Behavior in Scale-Eating Cichlid Fish: Its Potential Role in Shaping Morphological Asymmetry., Expressed preference for one hand, while they are not able to talk.

ambidexterity brain is more symmetrical. And if your hands perform the tasks equally well, it means that both hemispheres are connected with the same functions. So far, scientists have not agreed, the advantage of this or lack of.

Whether it is necessary to develop ambidexterity

It is not known exactly how this skill learning affects the brain. Although different trainings promise that the use of the non-dominant hand strengthens the connection between neurons and increases creativity, evidence of this was found.

Some scientists even believeHandedness and intellectual achievement: An even-handed lookThat innate ambidexterity is associated with problems in speech and reading, as well as attention deficit. It is assumed that this is caused by the rivalry between the brain hemispheres. Asymmetry developed for each hemisphere specialized in individual functions.

In the symmetric ambidexterity brain hemispheres receive the same sensory information. This may slow down the process of thinking.

However, while all this is only a hypothesis. There is no evidence that the work of the non-dominant hand will lead to psychological problems. Therefore, it's up to you.

How to train the non-dominant arm

1. Write or draw with both hands simultaneously. To a piece of paper on the table did not move, fix it with something. First, words and drawings will be very crooked, but after a couple of weeks will be better prepared. The main thing - practice every day for at least a little.
2. Write the non-dominant hand. For example, learn how to display the alphabet uppercase, lowercase letters and italics. Pick up a pen that glides over the paper, and exercise daily.
3. To write it easier, do not squeeze the handle too tightly, otherwise you have a sore arm. If you are right handed, turn the piece of paper by 30 degrees clockwise. If the left-hander - 30 degrees counterclockwise.
4. Write a leading hand and at the same time look in the mirror. You will see how it will look your nondominant hand in the time of writing. So it will be clearer, as it is located, and the picture will be postponed in the brain.
5. Strengthen your muscles the non-dominant hand. Raise the dumbbells or simply something heavy, gradually increasing the weight.
6. Try to prepare the non-dominant hand. Do not touch the knife: it can be dangerous. To begin, whisk the eggs in a bowl and mix the ingredients.
7. Follow her simple everyday things: brushing your teeth, hold the spoon hits the ball on the floor and walls.
8. Gradually move on to complex non-hazardous tasks. Follow them only the non-dominant hand to strengthen the skill. However, note that if you are too early to begin to use both hands in the dominant will still be an advantage, because you used it all my life.