“Researchers at the University of California, San Francisco surgically implanted a battery-operated, matchbook-sized device in Sarah’s brain — a ‘pacemaker for the brain’ some call it — calibrated to detect the neural activity pattern that occurs when she is becoming depressed. It then delivers pulses of electrical stimulation to stave off depression.” NYT (Gift Article for ND readers): A ‘Pacemaker for the Brain’: No Treatment Helped Her Depression — Until This. (It’s like I always say, 220, 221, whatever it takes.)