Which is NOT a primary PD motor symptom?

• A. Hyperreflexia
• B. Bradykinesia
• C. Resting tremor
• D. Rigidity

Answer: (A)

Parkinson's disease manifests with a trio of motor signs that stem from dopamine loss in the basal ganglia: bradykinesia (slowness of movement), resting tremor, and rigidity. These are the hallmark features used to identify the motor presentation of the condition. Hyperreflexia, on the other hand, is an exaggerated reflex response that points to upper motor neuron involvement and is not part of the typical PD motor picture. In PD, reflexes are usually normal, and the signs arise from altered movement control and muscle tone rather than heightened spinal reflex activity. So, hyperreflexia does not fit as a primary motor symptom of Parkinson's disease. If hyperreflexia is present, it should prompt consideration of other neurological processes or a coexisting condition affecting the corticospinal tract.