Figure 4. Grip force at object lift onset and object hold.

Grip force (F_G) at object lift onset and during object hold on the 1^st trial (averaged across all weights), and averaged across trials 2 through 7 are shown for the CTS and control groups (filled and open symbols, respectively) and each weight condition. Note that F_G during object hold on the first trial is not plotted since F_G did not change significantly across trials, i.e., F_G during hold on the first trial  =  F_G on trials 2-7. Vertical error bars denote standard errors.