Intellectual Disability-Epilepsy-Extrapyramidal Syndrome is related to neurodevelopmental disorder with hypotonia and impaired expressive language and with or without seizures. An important gene associated with Intellectual Disability-Epilepsy-Extrapyramidal Syndrome is DEAF1 (DEAF1 Transcription Factor). Affiliated tissues include brain and eye, and related phenotypes are intellectual disability and constipation