It affects both men and women, usually between the ages of 30 and 45. This means that for every positive diagnosis an average four more people are at risk. Huntington's Disease is caused by a faulty gene on chromosome 4a. Anyone who inherits the faulty gene will, at some point in their life, show rnanifestations of the disease. It is estimated that there are up to ten thousand postively diagnosed sufferers in this country.
Genetic testing is available and ten per cent of all diagnoses are now juvenile.
The preliminaries to the taking of this blood test cause severe mental anguish and an important part of the process is to offer counselling and support. DNA is extracted from the blood and analysed, the results being ready five to six weeks later. Symptoms can differ from person to person. There are usually physical and psychological changes. In the earlier stages, some uncontrollable muscular movements, clumsiness, lack of concentration, forgetfulness, rapid mood changes, violence, aggressive outbursts and anti-social behaviour.