While neurodevelopmental and genetic disorders are often diagnosed in childhood, understanding and managing the impact of these conditions is a lifelong challenge. This authoritative handbook presents cutting-edge knowledge to guide effective assessment and treatment throughout the adult years. Illuminated are the neurobiological bases and clinical characteristics of a broad range of conditions that affect learning and behavior as well as physical functioning and health. Following a consistent format, chapters comprehensively describe the developmental course of each disorder, the changing needs of adults, and ways to help them harness their strengths.