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. 2013 Sep 3;3:tre-03-178-4116-2. doi: 10.7916/D8251GXN

Figure 4. Saccadic Dynamics along the Main Sequence.

Figure 4

(A) Peak velocity vs. amplitude of saccades. For all movement amplitudes, subjects with essential tremor generally exhibit lower peak velocities than controls (Vmax = 400°/second for essential tremor [ET] subjects vs. 500°/second for controls, C  =  19.9 for ET subjects vs. 9.1 for controls). (B) Saccadic duration vs. amplitude. Saccades are generally slower for subjects with ET compared to controls, with the group differences becoming progressively greater with increasing saccadic amplitude (average duration of a one degree saccade (D1)  =  28.8 ms for ET subjects vs. 20.6 ms for controls, exponential value (n) for ET subjects  =  0.41 vs. 0.39 for controls).