Gemma Conroy in Nature:
The brain is a noisy place. Sometimes two brain regions that are far apart are active at the same time, suggesting that they work together to support the same function. Such regions are said to be functionally connected, even though they do not necessarily sit close to each other in the brain.
To understand how this functional connectivity is organized, brain areas are plotted along a scale, or axis, on the basis of their connectivity patterns with the rest of the brain, says study co-author Patrick Taylor, a computer scientist at the University of North Carolina at Chapel Hill who focuses on neuroscience. There are three main functional axes. The sensory-to-association axis, for example, allows researchers to describe brain regions that lie along a continuum from those that focus mainly on processing sensory information to those that are engaged in sophisticated processes such as integrating sensory information into complex thought. The brain regions at each point along the axis have similar patterns of connectivity.
More here.
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