To demonstrate the feasibility of hand-grasp control, we substituted wrist control for his myoelectric control.
A Student t-test was then used to determine significant differences in mean number of completions between the tenodesis grasp (no FES) and grasp with the neuroprosthesis using wrist control.
The third and fourth bars for each object illustrate the results of the GRT performed specifically for this study (GRT2) and show the mean number of completions for tenodesis grasp (no FES) and wrist control (FES), respectively.
Note the differences between MES and wrist control that are evident in the light-object group and the palmar-grasp group.
Objects such as the peg and block may be picked up by tenodesis grasp alone, but GRT2 also indicates that FES with wrist control does not hinder a user's manipulation of these lighter items.
The GRT also helps describe the inherent success and limitations of wrist control when used in the two different grasp modes.