The book "The Floppy Infant" by Victor Dubowitz, published by Spastics International Medical Publications in 1980, is a landmark work that systematically addresses the floppy infant syndrome, a condition previously marked by confusion and disagreement. Dubowitz's classification of infantile hypotonia syndromes, based on recent histochemical and electron microscopic studies, helps in developing more logical diagnostic and treatment plans. The book distinguishes between hypotonic syndromes with and without muscle paralysis, including spinal muscular atrophies, congenital myopathies, central nervous system disorders, and connective tissue disorders. The second edition, reviewed and expanded, retains Dubowitz's practical approach while updating and expanding content on various disorders, providing detailed illustrations and new tables. It is a valuable resource for medical students, pediatricians, and neurologists, offering concise and practical information on a frequently observed pediatric syndrome.The book "The Floppy Infant" by Victor Dubowitz, published by Spastics International Medical Publications in 1980, is a landmark work that systematically addresses the floppy infant syndrome, a condition previously marked by confusion and disagreement. Dubowitz's classification of infantile hypotonia syndromes, based on recent histochemical and electron microscopic studies, helps in developing more logical diagnostic and treatment plans. The book distinguishes between hypotonic syndromes with and without muscle paralysis, including spinal muscular atrophies, congenital myopathies, central nervous system disorders, and connective tissue disorders. The second edition, reviewed and expanded, retains Dubowitz's practical approach while updating and expanding content on various disorders, providing detailed illustrations and new tables. It is a valuable resource for medical students, pediatricians, and neurologists, offering concise and practical information on a frequently observed pediatric syndrome.