Fig. 8.1. An axon being remyelinated in the primary visual cortex of a 35 year old monkey. The remyelinated axon (axon1) is enclosed by a sheath that appears to consist of a single lamella. The two ends of the process forming the sheath abut at the location indicated by the arrow. Nearby is another axon (axon 2), which is partially surrounded by a process and indicating that it may be in an early stage of remyelination. A third axon (axon 3) is partially covered by a process that is making a junction with its axolemma, suggesting that this axon is sectioned at the level of the paranode/node interface.