Fig. 12.7A. A copy of the electron micrograph is Fig. 12.7 , in which some of the cellular components have been colored. An oligodendrocyte in layer 4 of the visual cortex of a 35 year old monkey. The process extending from the cell body of this oligodendrocyte has a large swelling that is full of dense inclusions. It remains to be proven, but it is likely that the inclusions are derived from a degenerating sheath to which the cell is attached.

Oligodendrocytes- red; neuronal cell bodies and dendrites- blue; dendritic spines- grey; axon terminals- green; astrocytes- yellow.