In people with Parkinson's disease (PD), walking impairments like reduced stability, speed, and stride length are common. These impairments involve a shift from automatic to compensatory control, mainly in the prefrontal cortex (PFC). Increased gait variability, seen in PD, suggests reduced automaticity and higher PFC activity, indicating greater attentional demand. However, it's unclear if specific gait domains correlate with changes in PFC activity. We hypothesize that increased PFC activity during walking may correspond to higher gait variability.