Alzheimer's disease (AD) is neuronaldegeneration with irreversible process. It is a common disease of middle-aged and aged.
阿尔茨海默病(AD)是一种进行性神经退行性疾病，是中老年常见病。
2
Objective: to explain MRI findings of secondary neuronaldegeneration due to old brain injury and to assess their clinical significance.
目的：阐明陈旧性脑损伤继发神经元变性的MRI表现及其临床意义。
3
There is evidence that both neurotrophic factor deprivation and oxidative stress are major potential players as pathological processes in neuronaldegeneration.