<snip>
I have a question. After the completion of the actual questions, there was a request to answer questions about how tall someone is, and what surprised me the most was "What is your handedness?" and the choices given were:
N/A.
Right handed.
Left handed.
Ambidextrous.
I didn't really know how to answer this question. When I was a child I was right-handed. The only peculiar thing was that when clapping as in applauding, my left hand always went over my right hand. Over the years, especially, in the last 15 years or so (and this process seems to accelerate) I've noticed that I use my left hand more often and for certain tasks, like holding a cigarette, for example :) I can't say that I'm using right and left hands equally, because I tried writing with my left hand and the results are incomprehensible still, and it's very hard to do.
So, at first, while doing the test I put right handed. Then, I just changed the answers to handedness question putting ambidextrous, or N/a ( I'm not left handed in a usual sense) and the results were the same.
Then, from the article on SOTT "Lefty or Righty? Genes for handedness found" http://www.sott.net/article/266346-Lefty-or-Righty-Genes-for-handedness-found we read
The findings suggest that the same genes that affect the left-hand symmetry of organs in the body also affects the way the brain is wired. That, in turn, affects whether someone's right or left hand is dominant.
"Handedness is an outward reflection of brain asymmetries for motor coordination," Brandler said. "If you're right-handed, it means you're left hemisphere dominant for motor coordination. That's because our brains are cross-wired."
Still, to truly tease out the roots of left-handedness, researchers will need to untangle the role of hundreds of other genes and isolate environmental factors, he said.
Therefore, it maybe that if there are genes that define left or right handedness, they might be subjects to epigenetic changes in the environment (impressions and/or influences) that change wiring of the brain?
<snip>