Huntington's Disease Huntington's Disease is a rare hereditary disorder. It is characterized by irregular movements of the body, slurred speech, and the deterioration of mental functioning. Symptoms of the individual include alternating periods of excitement and depression. It is caused by a buildup of neurotransmitter fluids, which can cause schizophrenia. The first symptoms of the disease usually appear between the ages of 35 and 45, but much earlier and later occurrences are also known. Since this disease occurs later in life, the only chance you would have of being diagnosed with it was if it was in your family's history. If one of the parents of a child