Scientists say they are one step closer to analyzing animal behavior by monitoring brain activity, following a recent experiment that involved tapping into the brainwaves of a zebrafish during feeding time. Researchers used a sensitive fluorescent probe to find the fish's neuronal activity down to the level of a single cell, noting fluctuations corresponding to its behavior. "Our work is the first to show brain activities in real time in an intact animal during that animal's natural behavior," said Koichi Kawakami of Japan's National Institute of Genetics.

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