What is an example of a motor disorder symptom in Parkinson's Disease?

Loss of muscle control is a prominent motor disorder symptom in Parkinson's Disease. This condition is characterized by the progressive degeneration of the nervous system, which affects movement and results in symptoms such as rigidity, bradykinesia (slowness of movement), and postural instability. Patients often experience difficulty with fine motor tasks and may have a shuffling gait, tremors, and an overall reduction in the smoothness and control of their movements. This loss of muscle control is fundamentally linked to the impairment of the basal ganglia, which plays a crucial role in coordinating movement.

While the other options—sleep apnea, loss of olfactory function, and short-term memory loss—can be associated with Parkinson's disease, they do not specifically describe motor symptoms. Sleep apnea relates to breathing irregularities often seen in patients, while loss of olfactory function refers to the inability to smell, which is a non-motor symptom that can occur early in the disease. Short-term memory loss can be a cognitive or non-motor symptom that may develop as the disease progresses but is not exclusively or primarily related to movement disorders.