A study in 2013 found out that depression is linked to subsequent vascular dementia and Alzheimer’s disease. The study’s researchers found out that older people who are depressed were more likely to develop Alzheimer’s Disease by 65%. It doesn’t literally cause Alzheimer’s, but it contributes to the development and to the rapid progression of the said neurological disease. Considering older adults who have mild brain damage, depression causes the brain to be more intoxicated and can add to the deterioration of memory.
Chronic inflammation causes damage to blood vessels. The blood flow to the brain can be caused by depression, leading to the degeneration of neural networks in the brain. Experts formulated the hypothesis regarding depression as the early signal of dementia. Depression can possibly serve as an emotional reaction to impaired thinking and unreliable memory. It also depletes a person’s cognitive reserves, exposing dementia or Alzheimer’s to the light of a person’s life.