This is a study relating the neuroanatomical system to speech and language. It emphasizes speech language disorders associated with traumatic injuries, lesions, dementia and aphasia. The first section of the book describes the anatomy and some of the diseases of the nervous system. The author then discusses a range of aphasias, neurological disturbances associated with aphasia, the mechanisms and results of head injury and methods of identifying lesions. The book also investigates the effects of dementia and dysarthria on language and the speech mechanism, and discusses the various types of each of these disorders.