Can A Smell Test Predict Parkinson’s Disease?

ScienceDaily, January 9, 2008. Doctors know that an impaired sense of smell is an early indicator of Parkinson’s Disease. This article reports on a study underway to determine whether a smell test can determine early if people with no symptoms will eventually develop the disease. “With Parkinson’s, we are dependent on the presence of motor symptoms like tremors, stiffness and slowness in order to diagnose it. By that time you have lost 50 to 60 percent of your dopaminergic cells, which make dopamine and are key to movement control. The question becomes, is there a window between when you had non-motor symptoms like loss of smell and when you begin to demonstrate clinical motor symptoms?”


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