Effect of myrtenal on brain acetylcholinesterase activity and TNF-α in STZ-induced demented mice (Mean ± SEM, n = 7/group). Activities of acetylcholinesterase and TNF-α was estimated in hippocampal tissues and the significance of the change in concentration determined using ANOVA, followed by Tukey's posthoc test is indicated by asterisks ∗ p < 0.05, ∗∗p < 0.01, ∗∗∗p < 0.001, compared to the STZ group.