chorea : Huntington's chorea is another name for Huntington's disease which refers to a fatal genetic neurologic disorder whose onset is in middle age; A genetic, autosomal dominant progressive subcortical dementia that inflicts devastating motor impairment in the form of chorea, as well as cognitive decline on adults in the prime of their lives. (see Huntington's disease)
dementia ; a progressive and degenerative disease that causes difficulties in cognition , emotion , and movement. Moreover, Huntington's disease is defined as hereditary condition causing dementia that involves a widespread deterioration of the subcortical brain structures and parts of the frontal cortex that control motor movements. It is characterized initially by jerky arm movements and facial twitches and later by tremors, writhing movements, and psychological symptoms, including depression, memory impairment , hallucinations , and delusions. Huntington’s disease is also called Huntington’s chorea .