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For the first time ever, scientists have captured thought on video in real
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t looks like a pink and purple grain of rice zipping around a large Dur-
le 部 Really, that grain of rice is a thought moving around in the brain
a zebrafish.
Researchers at the National Institute ef 人Qene08 in Japan picked。 the
brafish for this study because it has a see- -tbrough body By が the
nes ofe zebrafish larvae, scientists can make certain parts of the fish glow
ith Huofeseence. Since neurons in the brain use calcium to fire, the Saita-
ia University researchers linked a protein to the fish's genes that glows
the pf6Rence of calcium. When neurons fire in the fish's brain, the pro-
in lights up,and we can seeit withthe helpofa 06808nt microscODe.
je can make the invisible yastpeGDet most important,” said re-
earcher Koichi Kawakami. ME
409 Ame tt
Once yourve got a fish with a glowing brain, how do you know what it's
inking about? Before recording the thought, the scientists fjgured out
hich neurons in the fish's brain responded to movement. Then, they re-
leased a paramecium, a tiny single-celled creature that the fsh love to eat-
the paramecium moved, neurons in the fsh's brain Hit up in a pattern
at matched the fish's motion.
5|So what does a fish think about? Thats easy 一 food! 9上 民【
