Brains

The complexity of the human brain, in its construction and function, has limited our ability to understand it. 

Its 86 billion neurons are tiny sparks animating thoughts, perceptions, feelings and important functions throughout the body. Fabian Theis, director of the computational health center at Helmholtz Munich, who works on several atlas efforts but was not involved in the brain atlas, remembers one colleague telling him that the brain is like a separate organism. “It’s like 100 organs meshed into one,” he said.

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