WASHINGTON, D.C. — Thanks to a mouse watching clips from 'The Matrix,' scientists have created the largest functional map of a brain to date – a diagram of the wiring connecting 84,000 neurons as they fire off messages.
WASHINGTON, D.C. — Thanks to a mouse watching clips from 'The Matrix,' scientists have created the largest functional map of a brain to date – a diagram of the wiring connecting 84,000 neurons as they fire off messages. Using a piece of that mouse's brain about the size of a poppy seed, the researchers identified those neurons and traced how they communicated via branch-like fibers through a surprising 500 million junctions called synapses.
A team at Baylor College of Medicine did just that, using a mouse engineered with a gene that makes its neurons glow when they're active. The researchers used a laser-powered microscope to record how individual cells in the animal's visual cortex lit up as they processed the images flashing by. Next, scientists at the Allen Institute analyzed that small piece of brain tissue, using a special tool to shave it into more than 25,000 layers, each far thinner than a human hair.
Map Part Of Mouse's Brain—So Complex It Looks Like Galaxy
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