The problem of mild acquired traumatic brain injury is an old one. It was described in the 1860s by Erichson and Trimble

and called the “postconcussion syndrome,” as well as the “posttraumatic syndrome.” Dr. Page, in the mid 1880s, began a good bit of controversy by expressing doubts that the closed “spinal concussions” seen in the railway accidents described by Erichson were real.