How A Smell Test May Predict Parkinson S Disease
But nonmotor symptoms, like mood disorders and sleeping problems, are also common in Parkinson’s. One nonmotor symptom that experts are particularly focusing on is a loss of smell, which occurs in approximately 90 percent of people with early-stage Parkinson’s disease. This loss of smell (called hyposmia or olfactory dysfunction) not only impairs a person’s quality of life, but it’s one of the earliest symptoms of Parkinson’s. So taking this idea a step farther, experts believe that if a person’s smell disturbance is detected early, it could provide a clue to their underlying neurological disease—and there is now research that has turned this idea into reality....