Neurodevelopmental retardation
Developmental delay refers to the phenomenon of slowing down or abnormal sequence in the process of growth and development, with an incidence rate of 6-8%. Specifically, children with developmental delay refer to those who are under the age of 6 due to various reasons (including cranial nerves or muscle nerves, physiological diseases, psychological diseases, social and environmental factors, etc.), and have developmental delays or abnormalities in cognitive development, physiological development, language and communication development, psychosocial core development or self-care. Mental retardation is a group of diseases with intellectual development disorders as the prominent manifestation.