HD Glossary

Note: Some words can have differing definitions depending on the context in which they are used. The definitions presented here are the ones that best apply to the words as they are used. HDSA is grateful to the Stanford Hopes website for their contribution and maintenance of this glossary.



  • quinolinic acid (QUIN or QA) - An excitotoxin used by researchers to induce degeneration of nerve cells and oxidative stress in the brains of animals to simulate diseases such as HD.