Congenital disorders of the nervous system

Congenital diseases of nervous system, also known as developmental anomaly of nervous system, are acquired nervous system development or developmental defects caused by multiple pathogenic factors during embryonic development . During the embryonic period, especially during the first 3 months of pregnancy, the nervous system is developing vigorously. The fetus is susceptible to invasion of maternal and external environmental pathogenic factors, causing neurological developmental disorders, retardation or defects. Various deformities and abnormalities. Congenital diseases of the nervous system are different from hereditary diseases in that these pathogenic factors come from the outside rather than determined by genetic genes. The incidence of this group of diseases is not high, but the degree of disease is different, and there are many types of diseases. Dyken and Krawiecki list hundreds of them. Some diseases are very rare, some are obvious at birth, and some are in the development of the nervous system. Gradually manifested in the process. Many of the causes and pathogenesis that determine these abnormalities are not yet clear, and some have an internal connection with the genetic genes or play a synergistic role. Therefore, it is difficult to draw an absolute line with genetic diseases. Embryonic nervous system structural defects can affect brain, spinal cord, nerves, and muscles and other tissues and organs to varying degrees, and are often accompanied by eye, nose, skull, spine, ear, and heart diseases. Certain non-neurological tissue deformities can also indicate nerves. System abnormalities are caused by developmental disorders. Some embryonic brain tissue abnormalities may not be accompanied by defects in other tissues and organs, and may be the longest time required for the development and maturation of the nervous system in all organ systems. Therefore, they are more susceptible to the effects of various factors during the perinatal period and during delivery. high. Theoretically, developmental abnormalities caused by various reasons should be manifested at birth, but if abnormally involved brain tissues that have not yet exhibited function at birth, the fetus can develop symptoms after a certain period of time.