neural tube defects, neuronal migration disorders, hydrocephalus in children, paediatric neurology, spina bifida, lissencephaly, pediatric hydrocephalus, NTD causes, hydrocephalus treatment, neuronal migration defects causes, pediatric brain disorders, congenital brain defects, CSF disorders in children, VP shunt, aqueductal stenosis, pediatric neurosurgery, fetal neural development, neurodevelopmental disorders children
Paediatrics
Neural Tube Defects Neuronal Migration Disorders Hydrocephalus in Paediatrics Complete Guide
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Neural tube defects are congenital malformations caused by failure of neural tube closure during early embryonic development, leading to conditions such as spina bifida, anencephaly, and encephalocele.
The most common cause is folic acid deficiency during pregnancy. Other risk factors include maternal diabetes, obesity, genetic factors, and use of drugs like valproate.
Neural tube defects can be prevented by taking folic acid supplementation before conception and during early pregnancy, typically 400 mcg daily for low-risk women and higher doses for high-risk cases.
Neuronal migration defects are disorders of brain development caused by abnormal movement of neurons during fetal life, resulting in structural abnormalities like lissencephaly, polymicrogyria, and heterotopia.
Common symptoms include developmental delay, seizures, intellectual disability, hypotonia, and motor abnormalities depending on the severity of the defect.
Diagnosis is primarily done using MRI of the brain, which shows structural abnormalities, along with genetic testing in selected cases.
Hydrocephalus is a condition characterized by excessive accumulation of cerebrospinal fluid in the brain ventricles, leading to increased intracranial pressure and ventricular dilation.
Common causes include congenital abnormalities like aqueductal stenosis, neural tube defects, intraventricular hemorrhage in preterm infants, infections, and brain tumors.
Signs include increased head circumference, bulging fontanelle, sunsetting eyes, irritability, poor feeding, and vomiting.
Definitive treatment is usually surgical, most commonly ventriculoperitoneal shunt placement or endoscopic third ventriculostomy, along with supportive care.
