The phenomenon of ‘consciousness’ is intrinsically related to one’s awareness of one’s self, of time, and of the physical world. What, then, can be learned about consciousness from people who have suffered brain damage, such as amnesia, which affects their awareness? The author of this book is a neuropsychologist who has worked with such patients over a period of thirty years. This book begins with a review of some of the conditions in which brain-damaged patients can be said to have lost awareness of a retained capacity, followed by a discussion of some of the general issues that are pertinent to neuropsychological analysis.