tokens: Injections of scopolamine into mice resulted in impaired performance on Y - maze tests ( a 37 % decreases in alternation behavior ). By way of contrast , mice treated with daidzein prior to the scopolamine injections were noticeably protected from this performance impairment ( an approximately 12 %- 21 % decrease in alternation behavior ). These results indicate that daidzein might play a role in acetylcholine biosynthesis as a ChAT activator , and that it also ameliorates scopolamine - induced amnesia