Pain does not have to be painful. That's the conclusion of a study that identified a set of nerve cells that add emotional content to pain signals in the brains of mice.
Discovery could lead to new treatments for chronic pain that ease patients' suffering without impairing their ability to sense Injuries
Pain receptors throughout the body detect painful stimuli and send signals via nerves to the brain. But according to Gregory Scherrer at Stanford University, California, these signals don't…