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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Neurobiol Aging. 2010 Jan 15;32(12):2254–2265. doi: 10.1016/j.neurobiolaging.2009.12.024

Figure 3.

Figure 3

A modest effect of age alone on olfactory generalization gradients is measurable in a sufficiently large study. Middle-aged and aged mice exhibited broader generalization gradients than did young adult mice. Young adult mice: 2–4 months old; middle-aged mice: 7–9 months old; aged mice: 14–16 months old. Digging times are scaled so that the mean response to the CS in each age group is unity. S1: odorant highly similar to the CS; S2: odorant moderately similar to the CS; D: an odorant structurally and perceptually dissimilar to the CS (Table 1). Error bars denote the standard error of the mean.