Weak electrical fields in the brain help neurons fire together

The brain -- awake and sleeping -- is awash in electrical activity, and not just from the individual pings of single neurons communicating with each other. In fact, the brain is enveloped in countless overlapping electric fields, generated by the neural circuits of scores of communicating neurons. The fields were once thought to be a "bug" occurring during neural communication but new work suggests they do much more -- and may represent an additional form of neural communication.

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