Any Thoughts About Lefties?

[GutFeeling]

Many say that left-handed people have tendencies to skills in some sports and charisma, but they also emphasize the increased risk of psychosis, high blood pressure, epilepsy, schizophrenia, autism and so on. I have also seen theories that the main reason there are left-handed people is stress.
[Left-handedness and health]. - PubMed - NCBI
Handedness and health: an examination of the association between different handedness classifications and health disorders. - PubMed - NCBI

What do you think of this?

 

[fradon]

i see a lot of creative types with left handedness

 

[michael94]

Ive been throwing using my left hand more and find it beneficial

 

[lvysaur]

I've noticed that when I eat gelatin, my left hand gains some functionality. Normally I was always extremely right handed.

 

[Herbie]

Apparently the right hemisphere in the brain is more developed and the corpus callosum is larger in left handed people.

 

[Energizer]

"The current enthusiasm
among some American psychologists for explaining behavior
through differences between brain hemispheres could be
moderated by examining the Soviet work on cerebral function
which emphasizes a more holographic approach." - Mind and Tissue foreword, page 2.

I don't think handedness is really all that important. Both hemispheres are mutually trophic (they stimulate each other) and function builds structure, so a high metabolic rate should support thinking on both sides.

FWIW, I'm left-handed. The stress theory seems plausible. I don't notice any benefit of being left-handed (such as an advanced right hemisphere). If anything, it's probably a hindrance. The industrial world is largely designed for right-handers. Though my left hand has better fine motor coordination for writing, I've adapted by using a mouse-right handed, and my right hand is stronger than my left hand, so I typically throw a ball with my right hand (generally the right side of the body is stronger than the left due to developmental asymmetry).

 

[MrSmart]

Left-handed people have reduced lateralization of brain function, as well as other brain microstructure differences. It appears to me that it is indeed associated with testosterone-mediated effects during prenatal development, and ultimately manifests in the form of highly masculine brain function and behavior. Although it has a genetic component (well, so does everything), men are more likely to be left-handed than women for that reason. It does not appear to pose any immediate threat to its carrier in my understanding, but it does provide a better fighting ability vs other human competition, which is likely why it hasn't been naturally selected against. On the other hand, there is no good reason why it's not 50/50 today. It's ambiguous how symmetrical biology works.

 

[GutFeeling]

Thank you all guys, very interesting!
I feel calmer when I use my right hand.

 

[SOMO]

Lefties are all aspies and autists.

 

[GutFeeling]

Lefties are all aspies and autists.

It's not hard to agree with you.