Which of the following symptoms indicates Parkinson Disease?

• A. Difficulty reading
• B. Sneezing
• C. Mask-like facial expression
• D. Chest pain

Answer: (C)

The mask-like facial expression is a key symptom of Parkinson Disease, which is characterized by a reduction in facial movements known as facial masking. This symptom occurs due to the loss of dopamine-producing neurons in the brain, which affects the ability to control facial muscles. As a result, individuals with Parkinson's may present with a less animated appearance, giving the impression of a "mask" that does not change with emotions or interactions. Recognizing this symptom is important in the context of diagnosing and understanding Parkinson Disease, as it provides insight into the neurological changes occurring in the patient.

In contrast, symptoms like difficulty reading can arise from a variety of conditions, sneezing is commonly associated with allergies or respiratory issues, and chest pain typically indicates cardiac or pulmonary problems rather than neurological disorders like Parkinson Disease.