Fig 1.
An example of overt saccades generated in patients in each of our 3 groups.
A PSP-CBD overlap patient with an abnormally high level of tau protein in cerebrospinal fluid. Mean VS saccades velocity 116°/sec, Mean OS velocity 70°/sec and duration 50 ms. B is a group 3 member—an 84 years old woman normal control, Mean VS saccades velocity 402°/sec, Mean OS velocity 128°/sec and mean OS duration 24,5 ms and In C is a patient with a left sided chronic vestibular neuritis (group 2). Mean VS saccade velocity 420°/sec, Mean OS velocity 241°/sec and mean duration of OS 31 ms. The blue and black curve show head velocity superimposed with eye velocity respectively. Red circles: peak saccade velocity on the top; and duration start and end at the bottom (V0, V1) of the corrective saccades.
Table 1.
vHIT gains and saccade metricys in all three groups.
Table 2.
Gain and saccadic metric comparisons between the three study groups.
Table 3.
Correlations between saccadic parameters in each group.