Question about non dominant hand?

Question

Does your non dominant hand have less blood flow in it, weaker muscles, or is there a combination of both?

Answer 1

Dominance has nothing to do with blood flow, musculature or the like. Dominance refers to fine motor control (pincer like movements, etc.) which has more to do with brain mapping than anything else.

A non-dominant hand is just as strong in terms of grip strength, circulation, etc, as a dominant hand, What is different is the degree of fine control you can exert on it.

Your brain in utero seems to develop a preference for one side of the body over another. No one is really sure what controls this process. But what happens is that the brain map of fine motor control is larger for a dominant side than a non-dominant one. This is why it is very difficult to train a non-dominant hand to write. You can do it, with much training, but your fine motor coordination will not be the same as your dominant hand.

Amputees must learn to write all over again with a non-dominant hand, and it is very difficult the older you are when the amputation occurs.

Children's brains are more plastic, and can adapt quicker to changing dominance (as many a lefty forced to write with their right hands in school can attest).

Some people are ambidexterous, that is, they do not display a dominant hand, but are able to perform tasks equally well with either hand. They are pretty rare though.

Answer 2

Your non dominant hand has no less blood flow than the other. It doesnt do as much as the other so it might have weaker muscles. Just think about it. Whatever your dominant hand is you can hold heavier things longer than the other.  

Im notta scientist, but it just makes more sense to me.