Skip to main content
. Author manuscript; available in PMC: 2011 Mar 1.
Published in final edited form as: Brain Res Rev. 2009 Dec 11;62(2):212. doi: 10.1016/j.brainresrev.2009.12.002

Figure 3.

Figure 3

Electron micrographs show myelinated nerve fibers in area 46. A is from area 46 of a 10 year old monkey and shows that at this age the myelin sheaths around axons are compact. B is from area 46 of a 27 year old monkey, in which many of the myelin sheaths (D) have begun to degenerate and show dense inclusions within their lamellae. Other sheaths (asterisk) are empty because the axon has degenerated. Scale bars equal one micron.