Controlling a motorized orthosis to follow elbow volitional movement: tests with individuals with pathological tremor

Table 2 Pursuit tracking task summary

Sequence	Motion profile	Velocity	Repetitions	Target Velocity^a
1	Sinusoid target	Slow	3	Sinusoid velocity: A_vsin(2πft), where A_v=75.4 deg./s and f=0.3 Hz for slow case and A_v=125.5 deg./s and f=0.5 Hz for fast case.
2	Sinusoid target	Fast	3
3	Random target	Slow	3	Velocity profile was ramp shaped resulting in a parabolic position profile. Ramp top velocity: 22.2 and 50 deg./s for slow and fast cases. Ramp acceleration/ deceleration: 27.75 and 83.3 deg./s² for slow and fast cases.
4	Random target	Fast	3

All the tasks were repeated with both the MO and the TSO and recorded for approximately 30–60 s. Up to two training repetitions were offered for each device and motion profile
^aThe target parameters shown in the table are for the 0.246 cm/deg. scaling factor. A second scaling factor of 0.218 cm/deg. was also used in the study

ISSN: 1743-0003