A pacemaker for the brain helped a woman with crippling depression. It may soon be available widely

Emily Hollenbeck lived with a deep, recurring depression she likened to a black hole, where gravity felt so strong and her limbs so heavy she could barely move. She knew the illness could kill her. Both of her parents had taken their lives. She was willing to try something extreme: Having electrodes implanted in her brain as part of an experimental therapy.