Objective: To observe the effect of Zeng Yi Formula on the spatial learning and memory and nitric oxide/nitric oxide synthase in hippocampus of subactue senile rats.

• 摘要目的：探讨增忆方对亚急性衰老大鼠空间学习记忆能力的作用以及对海马一氧化氮及一氧化氮合酶的影响。