Fig. 2

Light microscopy and transmission electron microscopy results. The Toluidine Blue-stained light microscopy image (A) of a semithin section shows highly ordered myelinated axons running perpendicular to the slice. The mosaic TEM image (80 kV, 3150 × magnification) of 12 × 12 tiles (B) reveals the presence of some vacuoles (indicated by yellow arrows), probably caused by inadequate PFA immersion fixation.