A blow to the head or the dramatic acceleration and deceleration that occur in a serious car crash can cause a traumatic injury to the brain. At their most serious, these events are critical and life threatening, but even a mild incident can cause problems with memory, communication, and mental focus. What?s worse, this kind of cognitive function loss often causes other psychological symptoms like depression and low self-esteem. Fortunately, there are things anyone can do to recover from a mild traumatic brain injury, get back lost cognitive ability, and restore a healthy frame of mind.