Fig. Accumulations of glycogen (arrows) in the myelinated axons 9 hours after peripheral nerve transection. The elementary beta-particles of glycogen accumulate in the space between the inner and outer mitochondrial membranes, as well as inside the distended smooth endoplasmic reticulum and in its surroundings. Scale = 500 nm. (Mouse, femoral nerve.) Download the high resolution image (a); Download the high resolution image (b).