What is sensory integration (SI)? How do developmental disorders of SI manifest in children and adolescents? How and why does the treatment of disturbed sensory processing according to Jean Ayres work? The comprehensive textbook on SI answers all these questions: a "must-read" for all therapists working with learning and behavioral disorders. No other introduction is as well-founded, competent, and clearly understandable: testing procedures, treatment approaches, concrete guidelines, and many examples. Even more organized and up-to-date: including updates on neurology and physiology, sensory modulation and practice, and new practical perspectives.