Which of the following describes "pill-rolling" tremor?

• A. A tremor involving the entire arm
• B. A specific movement of the thumb and index finger
• C. A constant shaking of the head
• D. A pattern of rapid speech

Answer: (B)

The choice identifying a "specific movement of the thumb and index finger" accurately describes the "pill-rolling" tremor commonly associated with Parkinson's disease. This type of tremor typically manifests as a rhythmic, oscillatory motion where the thumb and index finger appear to be rolling a small object, similar to the action of rolling a pill between fingers.

This characteristic is a hallmark of the resting tremor seen in Parkinsonian patients and is particularly noticeable when these individuals are at rest. The nature of this movement is distinct and serves as a clinical sign of the disease, indicating not just the presence of tremors but also the specific patterns that can help differentiate Parkinson’s tremor from other types of tremors or motor disturbances, which may involve larger body parts or different rhythms.