What is the congenital condition in which the spinal cord and meninges protrude through a defect in the vertebral arch of one or more vertebrae?

Spina bifida can impact every vertebra, however in the ventral lumbar as well as sacral areas this is most extreme. In certain instances, it develops by the vertebral disorder (spina bifida cystica) in combination with those of the protrusion of the meninges (meningocele) or the spinal cord and meninges (meningomyelocele).