Alzheimer s disease(AD)is syndrome which begins with memory loss and visuo-spatial problems.With an increase of elderly population in our country,incidence in AD will grow.

• 随着我国人口老年化的加快,老年性痴呆(AD)发病率呈逐年升高的趋势,AD严重危害老年人的身心健康,引起了医学界和社会各界的重视,对AD的研究也越来越深入。