Congenital Hypotonia, Epilepsy, Developmental Delay, and Digital Anomalies, also known as chedda, is related to atn1-related neurodevelopmental disorder and arthrogryposis syndrome. An important gene associated with Congenital Hypotonia, Epilepsy, Developmental Delay, and Digital Anomalies is ATN1 (Atrophin 1). Affiliated tissues include brain and heart, and related phenotypes are intellectual disability and hypotonia