spi·na bi·fi·da

Spina bifida is a birth defect of the back bone and spinal cord that leaves the spinal cord exposed.  A person with spina bifida may have learning disabilities,  or problems going to the bathroom because of lack of bowel and bladder control, and usually needs crutches or a wheelchair to get around.  Eighty to 90% of babies with spina bifida survive, and most lead very productive lives.