Rett disorder, named after Andreas Rett who first described the condition in 1996, is preferentially found in females, and involves the functions on which intelligence and expression depend - learning, hand use and speech. The recent discovery of mutations in a specific gene, selectively silencing the expression of other genes, supports the hypothesis that the condition is a developmental disorder, which should be viewed in the context of early brain growth. This book presents a comprehensive review of the clinical, generic, anatomical and physiological aspects of Rett disorder, calling on...