Designs for Strong Minds (DSM) puzzles and the DSM mediation technique are vital tools in helping previously high-functioning adults who have mild or moderate posttraumatic head injuries. DSM treatment focuses on the difference between how patients dealt with the world cognitively before injury and how they deal with it postinjury, helping them bridge the gap and working with them to repair and rewire their cognitive processes so that they can again function at what they consider to be an acceptable level.