In the 1960s, neurosurgeon Benjamin Libet noticed there was a signal in the brain that occurred before you knew you were going to do something. On the surface, it looks like you don't have free will. But Libet noticed that humans do have the ability to say no to these brain signals. He called this free won't. Dr. Robert J. Marks and Dr. Richard Hurley discuss the current opioid crisis, addiction, and detoxing in relation to the brain.

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