Which symptom is recognized as a hallmark of Parkinson's Disease?

Resting tremor is a hallmark symptom of Parkinson's Disease, distinguishing it from other movement disorders. In individuals with this condition, the resting tremor typically manifests as involuntary shaking or oscillation in the limbs, especially noticeable when the patient is at rest and not engaged in purposeful movement. This type of tremor often decreases or disappears during voluntary movement, which is a characteristic feature of Parkinson’s.

This tremor is usually asymmetric, often starting in one hand before affecting the other side of the body. It is considered one of the primary motor symptoms, alongside rigidity, bradykinesia (slowness of movement), and postural instability. Recognizing these symptoms is critical, particularly since early diagnosis can significantly affect the management and progression of the disease.

In contrast, symptoms such as severe anxiety, frequent headaches, and loss of muscle tone may occur in various conditions or could be associated with Parkinson's but are not specifically recognized as defining features of the disease itself.