FYI'I Hurt All Over' http://cms.psychologytoday.com/articles/pt...501-000034.htmlThis part plays a role in IBS also"How do we register pain? The most widely accepted scientific explanation is the gate-control theory put forth in 1965 by Canadian psychologist Ronald Melzack and British physiologist Patrick Wall. According to the pair, an area running along the top of the spinal cord, called the dorsal horn, is crucial to the transmission of pain signals from the site of an injury to the brain. The horn acts as a sort of hatchway, controlling the intensity of signals and sometimes even halting them altogether.But that's only half the story. The brain isn't a passive receiver. It can initiate signals of its own and send them back through the gateway to the rest of the body "What's going on in the brain is very important," says Frank Keefe, Ph.D., a specialist in psychophysiology at Ohio University in Athens. "Thoughts and feelings can have a great impact on the pain experience." It is the brain that creates the perception of pain. Thus, though "it's all in her head" is often applied derisively to FMS patients, the truth is that, to a great degree, all pain is in the head."