ABSTRACT
Mild head injury (MHI) is estimated to occur in the United States at a rate of 1.3 million per year (Malec, chap. 2, this volume). Disorders with this prevalence generally have a scientific base that is clear, precise, and thoroughly understood, but not MHI. Reasons for the chaos of disagreement surrounding MHI have to do with its origins and definition. In this chapter, the set of symptoms associated with MHI is called MHI syndrome to avoid some of the negative connotations of some words referring to MHI. Some scientists have claimed MHI is “much ado about nothing,” but the aim of this chapter is to provide evidence that MHI is “much ado about something.”
