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. Author manuscript; available in PMC: 2022 Feb 1.
Published in final edited form as: Neurobiol Aging. 2020 Oct 27;98:78–87. doi: 10.1016/j.neurobiolaging.2020.10.020

Fig. 4.

Fig. 4.

Heat mapped representative images of DAMGO binding in the midbrain of experimental groups (A). Aged rats exhibited reduced PAG MOR binding compared to adults (B). No impact of sex was found. No differences in density were observed between handled and CFA treated groups so these data are combined. Data presented in disintegrations per minute per milligram. * Significant difference between adult males and females and aged rats; p<0.05 calculated by Tukey’s post hoc test. Graphs indicate mean ± SEM.