There are two types of Neural tube defects:
Open neural tube defects: These occur when the brain or penal card are exposed at birth through a defect in the skill or vertebrae examples: Spina bifida anenceperaly, encephalocele.
Closed neural tube defects: In such defects, the spinal cord is caused by skin. Such as lipomeningocele, Spinal code.
Spina Bifida: Is divided in to two sub closes:
Spina bifida occulta
Spina befida cystic