The portion of the fruit fly larva brain mapped in this project includes roughly 1,600 of the 10,000 neurons contained in a larva's entire brain. Priebe, a professor of applied mathematics and statistics in Johns Hopkins' Whiting School of Engineering. "Nobody's ever done a complete connectome" before, other than for a roundworm brain with roughly 300 neurons, said Carey E. The part of the fruit fly larva brain used in the study corresponds roughly to the cerebral cortex in mammals. The project could serve as a guide as scientists work their way up the animal kingdom and eventually chart connections among neurons in the brains of mammals. In a paper in the current issue of the journal Nature, the team reported on drawing up the map, known as a "connectome."
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