Huntington's disease is a disorder which causes both dementia and involuntary movements of the hands, feet, face, and trunk — all of which get worse over time. Those movements can either be rapid and jerky or slow and writhing. The dementia results in confusion, anxiety, disorientation, and personality change. Huntington's causes all of these symptoms through the degeneration of neurons in the basal ganglia, cerebral cortex, and other areas of the brain. The disease is genetic and carries through generations as an autosomal dominant trait. You can live with it for 10 to 25 years, if not more. In individuals with the disease, infections like pneumonia or physical traumas are often life-threatening.