A team at Stanford University in California used computer learning software to sort through data generated by brain scans and detect when people were in pain. Currently, doctors rely on patients to tell them whether or not they are in pain. And that is still the gold standard for assessing pain, Mackey said. But some patients — the very young, the very old, dementia patients or those who are not conscious — cannot say if they are hurting, and that has led to a long search for some way to objectively measure pain.
Read more here.