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"Scientists have generally believed that dendrites meekly sent currents they received from the cell’s synapse (the junction between two neurons) to the soma, which in turn generated an electrical impulse. Those short electrical bursts, known as somatic spikes, were thought to be at the heart of neural computation and learning. But the new study demonstrated that dendrites generate their own spikes 10 times more often than the somas." From here...

http://newsroom.ucla.edu/releases/ucla-research-upend-long-held-belief-about-how-neurons-communicate

And to add to that, the dendrite spikes are only digital some of the time.

"Explanations exist; they have existed for all time; there is always a simple explanation for everything — neat, plausible, and wrong." (To paraphrase:)

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