"Introduces students to the field through clinicians, patients, and families. Rich with examples, the first part covers foundational concepts of development, anatomy, physiology, augmentative communication and complex communication. Following these foundations, the second part highlights inherited and acquired disorders affecting children and older adults. A new chapter features multicultural topics, while an expanded chapter delves into advancements in assessment and intervention. Strong themes of literacy weave throughout. Expanded cased keep student interest with evaluation and treatment sections." -- Back cover.