Which feature is a characteristic of Parkinson's disease?

A mask-like face is a well-documented characteristic of Parkinson's disease, also known as hypomimia. In this condition, individuals may exhibit reduced facial expressiveness, resulting in a face that appears immobile or lacks the typical range of emotions. The decreased ability to express facial emotions can lead to a mask-like appearance, making it a distinctive feature in individuals diagnosed with the disease.

Other options, while potentially relevant to different conditions or stages of Parkinson's disease, do not encapsulate the hallmark features as effectively. For example, excessive blinking could be present in various neurological conditions but is not specific to Parkinson's. Tremors that occur only while at rest are indicative of Parkinson's, but they can also occur with other types of movement disorders. Rapid speech is typically associated with other conditions, such as mania or anxiety disorders, rather than Parkinson's disease. Thus, the mask-like face stands out as a clear and characteristic feature of Parkinson's disease.