Hi all,
I am left-handed and have noticed the difference all my life. For one, although not an introvert as such, I communicate somehow, differently to right-handers... always noticed it. Much of my effort/energy/awareness goes toward 'sensing' rather than talking, is the best way I can describe it. As an adult now, with developed self-awareness from the years, I can see that I get overwhelmed with linear chatter, and it seems to be because I am 'picking up' on other stuff - whether it's in the environment (a cafe or something), or facial expressions of my companion, or subtle emotional tones, I get kinda dizzy keeping up with all that's going on for me because my brain is so spatial.
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One way that I've put it to test is, when I play billiards, or Uno (card game), (both I reckon are right-brain activities and thus, more my domain), I play easily, and generally win over a right-handed person. When I play with a lefty though, it's more challenging - as well as the style is just different. I am apparently a "natural" at golf too (the one or two times I've had a hit), another (probably) right-brained activity.
I have researched as much as possible the left-handed syndrome, and haven't found anything much*. I was positively wrapped to find a good few pages touching on the subject in the Wave Series! (book 3 I think?). I have always wondered about the historical and archaic significance of lefties - were we all right-brained when once we didn't use language as we know it today? There seems to me to be some link between the right-brain and communication that is more of a psychic nature.
It's also my hypothesis that, lefties die early because of the strain on the brain, being in a right-handed world. If I "tune-in", I can really feel this strain. It's kind of like a constricting feeling, where thoughts and concepts in communication are forced to be bounded, narrowed and constrained. whereas, my brain seems to prefer to use a more abstract, unbounded, and expansive method. Hence my relief when talking with my lefty friends. It is also highly attuned to shapes and picture symbols as well - even though language is technically symbols. Maybe I should try taking up hieroglyphics or a language from Asia :)