Objective To study the effects of TSYZ formula on learning-memory and the depositions of beta-amyloid(Aβ1-40) in hippocampus and cortex of aged dementia model mice induced by AlCl3.Methods The aged dementia model mice were induced by long-term i.g AlCl3.The abilities of learning-memory were tested by Morris water maze.The methods of immunohistochemistry were used to detect the deposition changes of beta-amyloid(Aβ1-40).Results In TSYZ formula groups,the mean escape latency and the mean searching distance in...