ABSTRACT
We have defined the closed head injury syndrome of transient kind (CHIT) as having several subtypes: a physiological brain injury of the postconcussional dimension (PCCHITS), a psychological dysfunction of posttraumatic kind (PTCHITS), a focal residual kind (FRCHITS), or combinations mixed with these (MCHITS). Further, there is a synergistic physical, cognitive, and psychological synergism across the posttraumatic functional syndrome, and legitimate brain injury and predisposing factors and degrees of physiological brain reserve may determine exact manifestations of a CHIT (Neppe & Goodwin, chap. 10., this volume).
