Windy City Corvettes is proud to sponsor Spina Bifida Assoication of Illinois, a chapter of The Spina Bifida Association of America (SBAA) The SBAA is a nonprofit organization whose efforts benefit thousands of infants, children, adults, parents and professionals each year. Spina bifida is the most frequently occurring permenently disabling birth defect. More children have spina bifida than have muscular dystrophy, multiple sclerosis, and cystic fibrosis combined. It is the most common type of neural tube defect (NTD), in which the spinal chord is not completely enclosed in the spine at birth. Because of paralysis resulting from damage to the spinal chord, people born with spina bifida may need surgeries and extensive on-going medical care.