For 10 points, name this neurodegenerative (NUR-oh-dee-JEN-ur-uh-tiv) disorder named for a British physician.
This disease's Westphal (WEST-fall) variant is characterized by unusually young onset of symptoms. This genetically dominant disease is caused by a mutation leading to repeats on the polyQ ("PAUL"-ee CUE) region of three bases, CAG (C-A-G). Symptoms of this disease include dementia and most notably uncontrollable jerking and writhing movements that give this disease its alternate name of its namesake's "chorea" (kor-EE-uh). For 10 points, name this neurodegenerative (NUR-oh-dee-JEN-ur-uh-tiv) disorder named for a British physician.
This disease's Westphal (WEST-fall) variant is characterized by unusually young onset of symptoms.
{Huntington's} disease [or {Huntington's} chorea before mentioned]