Alzheimer Disease Causes and Symptoms

Alzheimer’s disease (AD), also known as Alzheimer disease, is the most common form of dementia. Alzheimer’s cause is different for each individual. Many hypotheses, such as cholinergic hypothesis, Amyloid hypothesis, Tau hypothesis and many other theories have been evolved to explain what is Alzheimer s and Alzheimer’s causes.

Studies are being carried out to know further details regarding the causes of Alzheimer. The studies conducted in the past have shown that the disease is characterized by the growth of proteins in the brain.

The studies have also proven that the disease develops due to multifaceted series of events that carry on in the brain over period. The other Alzheimer’s causes include genetic, environmental, and lifestyle factors.

As each people differ in their genes and lifestyle, the importance of these causes also differ from individual to individual in increasing or decreasing the risk factors that develop Alzheimer’s disease.

Changes in the brain due to age:

The disease, commonly found in older people, is due to age-related changes that take place in the brain, which may damage neurons and lead to Alzheimer’s.


Genes are also one of Alzheimer’s causes. Many early cases of Alzheimer’s are familial Alzheimer’s disease, which is caused by changes in one of three known genes inherited from a parent. The studies have also shown that the presence of the apolipoprotein E gene affects a person’s chances of the disease.

Environment and lifestyle factors:

The studies have also shown that several environmental and lifestyle factors may influence a person’s risk to develop Alzheimer’s disease. Habits such as non-smoking, less consumption of alcohol, active social life, and healthy diet have all decreased the chances of getting the disease while heart problems, obesity, blood pressure have increased the chances.

The studies have proved that there are no strict dimensions as to know what causes Alzheimer’s.

Alzheimer’s symptoms:

  •  Pre-dementia
  •  Early
  •  Moderate
  •  Advanced


The early Alzheimer’s symptoms include thinking problems, such as facing problem in finding the right words, judging the things in proper manner, execution of movements and so on.


As the disease advances memory loss becomes even severe, and changes in other cognitive abilities are obvious. The chance of diagnosing the problem at this stage is also easy. Problems can include:

  •   Trouble handling money and paying bills
  •   Asking same questions repeatedly
  •   Delay in carrying on day to day activities
  •   Lack of proper judgment
  •   Changes in behavior and personality


This stage is characterized with damages in areas of the brain that control reasoning, sensory processing, language and conscious thought process. Symptoms may include:

  • Augmented memory loss and confusion
  • Facing difficulty in recognizing family and acquaintances
  • Losing the capacity in learning new things
  • Inability to deliver multiple functions at a time
  • Hallucinations, delusions, and paranoia
  • Impetuous behavior


This is the final stage in the disease process. Patients lose the ability to communicate and gradually land up in a position where he depends completely on others for survival. The final stage symptoms consist:

  • Weight reduction
  • Skin infections
  • Inability to swallow
  •  Moaning, groaning, or grunting
  • Increased sleeping hours
  • Losing control of bowel and bladder


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