Fig. 6

Frequency distribution of the myelin thickness in the experimental groups. a–d Values were obtained after 8 weeks following the lesion in the experimental groups. e–h Values were obtained after 12 weeks following the lesion in the experimental groups. At 12 weeks, myelin thickness was superior in the PCL + MSC group compared with the PCL group. Red boxes highlight frequency intervals with better percentages among the autograft, PCL, and PCL + MSC groups. i–l Tendency to increase myelinated axons with larger diameters in GA and GPCL + MSCs compared to GPCL in 12 weeks was observed. Scale bar = 50 μm