Figure 4.
The sharing patterns of the VF tangential (gray bars) and normal (white bars) forces across the individual fingers. The averaged data across trials, subjects, and conditions are presented with standard error bars. Note that the shares of the “central” fingers (M and R) were smaller for the VF tangential force as compared to the normal force. I, M, R, and L stand for the index, middle, ring, and little fingers, respectively.