The PMD group meeting was organised by Peter - this is the second meeting, unfortunately we couldn't make the first one. It took us almost 2 hours to get there but we had a good time chatting to families whose children are affected by PMD.
Sam hasn't got PMD, but it was thought he may have it a few years ago - he does have a severe lack of myelin in his brain, but all the genetic testing for PMD has come back negative. So he has some sort of leucodystrophy, but we don't know which one yet !
Leucodystrophy is a genetic defect (a problem in the genes) affecting the myelin, the protective covering around the nerves in the brain and spinal cord. The myelin acts like the covering around electrical wires. It helps the nerves work and send messages from the brain to the body at great speeds. When the covering around the nerves is damaged, the brain and nerves are not able to send the signals to the body very well. There are 10 different chemicals that make up the myelin. And there are many different types of leucodystrophies. Each kind is related to how only one of the chemicals in the myelin works.