Neuroscience: Brain buzz
Found on Nature News on Saturday, 16 April 2011
Last year a succession of volunteers sat down in a research lab in Albuquerque, New Mexico to play DARWARS Ambush!, a video game designed to train US soldiers bound for Iraq.
The volunteers received a few milliamps of current at most, and the simple gadget used to deliver it was powered by a 9-volt battery.
"They learn more quickly but they don't have a good intuitive or introspective sense about why," says Clark.
Usually, the US applies more than just 9V to the head though. Especially in Texas.