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Like people who share news via Twitter, Facebook and Linkedln, cells, too, make use of multiple modes of information exchange. Some send out hormones, which travel far and wide via the bloodstream; others emit neurotransmitters, which carry signals between one neuron and another. But virtually all cells network with their neighbors via extensive collections of channels that directly connect the inside of one cell with the inside of the next.

Addiction touches us all. Whether it’s a friend who can’t quit smoking, or a colleague afflicted with alcoholism, we all know someone who suffers from some form of addiction — we may even have an addiction ourselves. But what actually happens to the brain on drugs, and what can neuroscience tell us about addiction? The Addictive Brain explains what happens at a neural level when someone sips coffee, smokes a cigarette, snorts cocaine, and more.