George Huntington's Discovery of Chorea: Historical Account

In 1872, 22-year-old George Huntington presented "On Chorea" to the Meigs and Mason Academy of Medicine in Middleport, Ohio, describing a hereditary disorder marked by progressive involuntary movements, cognitive decline, and psychiatric features. He coined the term "chorea" from Greek choreia (dance) after reviewing cases at the New York Asylum for Idiots (later Columbia University) where his father and grandfather had practiced.

Significance

• First clear clinical delineation of autosomal dominant adult-onset neurodegenerative disease.
• Noted anticipation (earlier onset in successive generations).
• Laid groundwork for 1993 identification of HTT CAG repeat expansion on chromosome 4p16.3.

Huntington's disease now affects ~5–10 per 100,000; genetic testing enables predictive diagnosis and reproductive planning.