Figure 6. Effects of treatment on the morphometric parameters of regenerating ulnar nerve fibers. Graphics show means ± SEM of A, myelinated fiber area; B, myelin sheath thickness; C, myelinated fiber diameter; D, axon diameter of the myelinated fiber; E, g ratio, and F, myelinated fiber density (MFD). ^*P < 0.05 compared to the control and sham groups; In C and D, ^**P < 0.05 for the difference between the unskilled training and crush groups. C = control group; S = sham; Sk = skill training; CC = crush; Usk = unskilled training (one-way ANOVA followed by the Duncan multiple range test).