Left and Right Handed: Causes & Differences

  • Medical
  • Thread starter En_lizard
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In summary, handedness is genetically predetermined and influenced by the dominant brain hemisphere. Left-handers are increasing in numbers, suggesting they may have some advantages. Befriending a lefty may even save your life.
  • #1
En_lizard
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why some people are right handed and some left handed? if it's because of the side of brain that control their motions, why some people are left handed but right foot or vice versa?:confused:
 
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  • #2
It is the advancement of humans through evolution. Left-handers are not only surviving, but their numbers are on the increase. This clearly demonstrates that they are superior. They are also more intelligent, better-looking, get hotter dates and find more winning prizes under the caps of pop bottles.

Befriend a lefty. Buy him lunch. It may just save your life one day.
 
  • #4
Being right or left handed is genetically predetermined. Its a recessive inherited condition. Normally most of the time our dominant brain hemisphere is the left one, most of left handers also have a dominant left brain hemisphere. Its all in the genes.
 
  • #5
DaveC426913 said:
It is the advancement of humans through evolution. Left-handers are not only surviving, but their numbers are on the increase. This clearly demonstrates that they are superior. They are also more intelligent, better-looking, get hotter dates and find more winning prizes under the caps of pop bottles.

Befriend a lefty. Buy him lunch. It may just save your life one day.
When I make a post like that in the Biology or General Physics section I always get busted and my post gets deleted. Ha ha ha... this one time, I said people that are shorter, are shorter because the air pressure in their geographic location, is higher. Or just yesterday. Somebody asked about static and their hair, and their comb. I said "don't forget to take the batteries out of your comb." Bah! DELETE! :grumpy:
 

What causes people to be left or right-handed?

The exact cause of handedness is not fully understood, but it is believed to be a combination of genetics and environmental factors. Studies have shown that approximately 25% of handedness is due to genetics, while the remaining 75% is influenced by environmental factors such as brain development and cultural influences.

Can a person change their dominant hand?

It is possible for a person to switch their dominant hand, but it is not a common occurrence. This change is known as "cross-dominance" and can happen due to a neurological injury or as a result of training and practice.

Are left-handed people more creative?

There is a common stereotype that left-handed people are more creative, but there is no scientific evidence to support this claim. While some studies have shown a higher percentage of left-handed individuals in certain creative fields, it is not a direct correlation and may be influenced by other factors.

Do left-handed people have a disadvantage in a right-handed world?

Left-handed individuals may face certain challenges in a world that is predominantly designed for right-handed people, such as using right-handed tools or struggling with handwriting. However, with practice and adaptation, left-handed people can learn to navigate these challenges effectively.

Is left-handedness linked to any health conditions?

There is no known link between being left-handed and any specific health conditions. However, left-handed individuals may be at a slightly higher risk for certain neurological conditions, such as dyslexia and ADHD, due to the way their brains are wired.

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