Many of the autosomal-recessive diseases have neurological features such as : developmental delay, intellectual disability, epilepsy and motor and/or sensory impairment. These diseases carry a heavy burden on the family, community and the educational, health and welfare authorities. The disabled children are often handicapped, go to special education programs, are not independent in daily living tasks, are often sick and in need of hospitalization. They will grow up needing special housing facilities. Their life span is usually shorter than normal. These children are dependent on their parents, they subdue the parents to misery, interparental conflicts and susceptibility to divorces. Most of the neurological diseases are untreatable nowadays. Most of the medical effort focuses on their prevention. For example, by finding the gene for a specific neurological condition, we could search for that same gene in the couple's next pregnancy. If the fetus is found to be affected we could offer genetic counseling and a possibility of pregnancy termination and so the family avoids the birth of an affected sibling.