He became delirious, then violent, yelling and pushing when nurses tried to insert an IV into his arm. Only after sedation was a physician able to slide a long needle between two vertebra in the small of his back and extract a few drops of cerebrospinal fluid. The doctor performing the procedure sensed trouble immediately.
Lisa was the scientists’ favorite participant because her brain scans were so compelling, so useful in creating a map of where behavioral patterns-habits-reside within our minds. “You’re helping us understand how a decision becomes an automatic behavior,” the doctor told her. Everyone in the room felt like they were on the brink of something important.