Link Banana

Fascinating:

Using MRI scans of gay and straight men and women, the researchers found that people who liked women — heterosexual men and homosexual women — had larger right brain hemispheres, while people who liked men — heterosexual women and homosexual men — had symmetrical brains. As seen in the image, MRI and PET scans showed a similar pattern in two specific regions of the brain, the right and left amygdalas, which are thought to control fight-or-flight reactions.

I’ve probably noted my fascination with synesthesia — associating numbers with colors, smells with shapes, etc — before, but this stuff is interesting:

Where does synesthesia come from? Maybe synesthetes are just lying. Perhaps they’re under the influence of hallucinogenic drugs — many research subjects are college kids, after all — or happened as children to play with colored alphabet blocks. Or maybe they’re simply good with metaphors.

To Ramachandran, the latter answer gets at the truth — but he stressed that what appears as metaphor is a literal sensory experience for synesthetes. That may explain, he said, why synesthesia is eight times more common among poets, artists and novelists than the general population.

The essence of art is, arguably, metaphor, and its practitioners are especially prolific — and metaphor is just a convenient shorthand for the connection of unlinked cognitive phenomena. That’s exactly what appears to happen in the minds of synesthetes. Far-flung parts of their brain have unusually high levels of cross-wiring.

It’s worth reading the rest of the post, if only for the heartening “we’re all synesthetes” argument at the end.

More stories on which I am behind the crowd:

• Monkey’s with robotic arms. What more is there to know?
• Age is Wisdom. Really. Well, maybe really. The conditions: “If older people are taking in more information from a situation,” as the article suggests, “and they’re then able to combine it with their comparatively greater store of general knowledge,” which the article doesn’t suggest, “they’re going to have a nice advantage.”
• We have two parallel but separate kinds of memory: “verbatim” and “gist.” This can explain how people so often believe things happened differently than they actually did. (via Marco)