What are the 15 Symptoms Indicating Parkinson's Disease?

13. Hypophonia

A majority of those with Parkinson's experience voice problems because the disease causes alterations to the muscle tone that affect the muscles required for speech. One of the most common of these speech issues is hypophonia or soft speech. Some people also develop a reduced distinction between questions and answers. They may speak in a monotone voice and have difficulty hearing their own level of loudness. As the disease progresses, listeners often find it difficult to understand the affected individual.