A self-contained portable head worn device and methods to stimulate a portion of the brain of a wearer are presented. A first electrode is held by the head worn device against the scalp of the wearer in a first location and a second electrode is held against the scalp of the wearer in a second location. A pulse generator generates a first electric signal received by the first electrode and a second electric signal received by the second electrode. A power source is connected to the pulse generator.
