5. Weakened Facial and Throat Muscles

As Parkinson's progresses, the symptoms become increasingly hard to miss. Many people develop changes in their facial appearance and speech patterns. The face tends to have a fixed, vacant expression called the "Parkinson's mask." Loss of facial muscle movement restricts facial expressions, including smiling, frowning, and laughing. Similarly, weakened throat muscles cause the individual's speech to become low-toned, unclear, and sometimes slurred. Choking, coughing, and drooling may develop at advanced stages.

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