Ralph Scott was walking to his office at East Carolina University when he fell. He was shaken, and a groundsman helped him up. He had scrapes on his knee and elbow, but no obvious head injury. The next morning, he felt…

Ralph Scott was walking to his office at East Carolina University when he fell. He was shaken, and a groundsman helped him up. He had scrapes on his knee and elbow, but no obvious head injury. The next morning, he felt…