Figure 5.

Calculation of hesitations and freezes: angular velocity ${\omega }_{\mathrm{rd}}$ (upper panel) and calculated $CS{A}_{\mathrm{T}}$ characteristic (bottom panel). The solid grey horizontal line marks the average $CS{A}_{\mathrm{T}}$ value. The dashed grey horizontal line corresponds to the upper threshold $T{H}_{50}=50\%$ of the $CS{A}_{\mathrm{T}}$ average value. The dotted black horizontal line shows the lower threshold $T{H}_{25}=25\%$ of the $CS{A}_{\mathrm{T}}$_- average value. Similarly, dotted grey vertical lines show areas that are classified as hesitations (an “H” mark) and freezes (an “F” mark). The example is given for one PSP patient (ID: PSP14).