Figure 5

Stride length data (blue squares) and periods of lying down (shaded boxes) during 24-h ambulatory activity in the community. Comparison between the patient shown in Figure 4 (A) with a late onset and short disease duration (2 years), exhibiting a consistent stride length over the day, with (B) a PD patient with a longer disease duration (12 years) and relatively early onset (53 years). Note the fluctuations in stride length over the 24-h epoch in the latter patient.