Which of the following is a common symptom of Parkinson's disease?

A propulsive gait, often referred to as a "shuffling gait," is characterized by small, hurried steps that can make an individual appear to be propelled forward. This symptom is commonly associated with Parkinson's disease due to the motor control issues that arise from the neurodegeneration affecting the basal ganglia. In Parkinson's disease, patients often experience bradykinesia (slowness of movement), rigidity, and postural instability, all of which contribute to the development of a propulsive gait.

Increased muscle strength during purposeful movements is not a symptom of Parkinson's; rather, individuals typically experience muscle rigidity and weakness. Sudden loss of consciousness occurs in various conditions, such as seizures or cardiovascular issues, but it is not a hallmark symptom of Parkinson's disease. Rapid involuntary eye movement, often related to conditions like nystagmus or certain neurological disorders, is also not a characteristic symptom of Parkinson's. Therefore, identifying a propulsive gait is crucial for recognizing the presence of Parkinson's disease and understanding its impact on motor function.