Most humans are right-handed. Only about 10% of us are lefties. That’s why we’re so often at odds with the way the world is set up. In school, while everyone else slants their writing to the right, we tilt the other way; in English-speaking cultures, our pages are smudged after we drag our writing hands across freshly inked text.
We won’t even talk about scissors. Playing an instrument requires special instruction — think Jimi Hendrix, who played a left-handed guitar — or capitulation — Paul McCartney plays right-handed, upside-down.It’s widely known that, on average, lefties have a more developed right-side brain hemisphere. This is the part of the brain associated with spatial reasoning and the ability to mentally imagine new orientations and combinations of objects, which may have something to do with the creative abilities of southpaws. Still, even in this regard, lefties are in the minority: only one third of right-brained people are lefties.
Less discussed — and maybe more interesting — is that sinistral and ambidextrous people have a more developed corpus callosum, a tangle of nerves sitting between, and connecting, the two brain hemispheres. Is this so because the left-handed are so often forced to do things right-handedly…
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