" The purpose of this book is to present those speech disturbances observed in lesions of the brain cortex in a form useful both for practical and theoretic purposes in the clinic. Such a presentation should aid in the examination of patients and establish that body of facts which is always necessary as a sound basis for therapy: for operation, if necessary, and for systematic retraining." Part one is concerned with the origin of aphasic symptoms. Considerable emphasis is given to the" organismic approach" which the author believes can" be understood only if we include that point of view usually called philosophic." In understanding and interpreting aphasic symptoms we can learn much from research in psychology of language, philosophy of language, linguistics, and child psychology. Various forms of language disturbance are described. Part two is devoted to case reports, pathologic anatomy, and treatment. 332-item bibliography.(PsycINFO Database Record (c) 2016 APA, all rights reserved)