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. Author manuscript; available in PMC: 2014 Sep 19.
Published in final edited form as: J Comp Neurol. 2013 Dec 20;522(3):573–591. doi: 10.1002/cne.23427

Figure 3.

Figure 3

Comparison of parvalbumin-positive cell density of the SOC between a 15- and a 35-year-old animal. Comparison of micrographs from a 15-year-old MNTB (A) and a 35-year-old MNTB (B) reveals no apparent age-related changes in density. However, when comparing a 15-year-old MSO (C) with a 35-year-old MSO (D), age-related density changes become apparent. Similar to the MNTB, the LSO showed no clear age-related changes between the 15-year-old (E) and the 35-year-old (F) animals. Conventions as in Figure 2. Scale bar = 100 μm.