Amnesia, derived from the Greek word meaning forgetfulness,I,2 has come to mean a "loss or lack of memory."2 The importance of this condition needs no emphasis, for it has always been associated with criminal law. St. Augustine's "ream lingum non tacit nisi mens rea" underpins the principle of the English and most other legal systems that a forbidden act (actus reus) and a wicked intent (mens r...