voice 1: Since early in the year 2005, scientists and doctors have been studying this family. The five young people have spent time in hospital. They have had many medical tests. They have other problems as well as their difficulty with walking. They have very limited language. They are unable to count from one to ten. And the different parts of their bodies do not co-operate well with one another.
But what is causing these problems? There has been much discussion and disagreement about them. Did they just lack good food and the right kind of care when they were babies? Or are their problems genetic?
voice 2: The scientists discovered that these five young people suffer from a rare genetic condition. It is called cerebellar hypoplasia. This condition is caused by a group of damaged genes. The damaged genes prevent an important part of the brain from developing. It is the part of the brain that affects how the parts of the body co-operate with each other.