About Dementia

About Dementia


Dementia is a syndrome (a group of related symptoms) associated with an ongoing decline of brain functioning. Criteria for the diagnosis of dementia include impairment of attention, orientation, memory, judgment, language, motor and spatial skills, and function. By definition, dementia is not due to major depression or schizophrenia. A dementia diagnosis requires a change from a person’s usual mental functioning and a greater decline than one would expect due to aging. These diseases also have a significant effect on a person’s caregivers.

Alzheimer’s disease is the most common cause of dementia. Other causes include AIDS, alcoholism, brain injury, vascular dementia (damage to the blood vessels leading to the brain), and dementia with Lewy bodies, brain tumors, drug toxicity, and infection of brain, Creutzfeldt – Jakob disease, meningitis, Pick disease, syphilis, and hypothyroidism.

There is no cure for dementia. Cholinesterase inhibitors such as donepezil are often used and may be beneficial in mild to moderate disorder. Overall benefit, however, may be minor. There are many measures that can improve the quality of life of people with dementia and their caregivers.


Causes, Sign and Symptoms of Dementia

Dementia is caused by damage to brain cells. This damage interferes with the ability of brain cells to communicate with each other. When brain cells cannot communicate normally, thinking, behavior and feelings can be affected. Different types of dementia are associated with particular types of brain cell damage in particular regions of the brain.


  • Depression
  • Medication side effects
  • Excess use of alcohol
  • Thyroid problems
  • Vitamin deficiencies

The symptoms of dementia vary across types and stages of the diagnosis. The most common affected areas include memory, visual-spatial, language, attention and problem solving. Most types of dementia are slow and progressive. By the time the person shows signs of the disorder, the process in the brain has been happening for a long time. It is possible for a patient to have two types of dementia at the same time. Additional psychological and behavioral problems that often affect people who have dementia include:

  • Balance problems
  • Tremor
  • Speech and language difficulty
  • Trouble eating or swallowing
  • Memory distortions (believing that a memory has already happened when it has not, thinking an old memory is a new one, combining two memories, or confusing the people in a memory)
  • Wandering or restlessness
  • Perception and visual problems



Diagnosis and Treatment of Dementia

A diagnosis can help people with dementia get the right treatment and support, and help those close to them to prepare and plan for the future. With treatment and support, many people are able to lead active, fulfilled lives. The symptoms of dementia tend to worsen with time. In the much later stages of dementia, people will be able to do far less for themselves and may lose much of their ability to communicate.

Treatment of dementia depends on its cause. In the case of most progressive dementias, including Alzheimer’s disease, there is no cure and no treatment that slows or stops its progression. But there are drug treatments that may temporarily improve symptoms. The same medications used to treat Alzheimer’s are among the drugs sometimes prescribed to help with symptoms of other types of dementias. Non-drug therapies can also alleviate some symptoms of dementia.

A number of factors can decrease the risk of dementia. A group of efforts is believed to be able to prevent a third of cases and include early education, treating high blood pressure, preventing obesity, preventing hearing loss, treating depression, being active, preventing diabetes, not smoking, and preventing social isolation.



  1. medicinenet.com
  2. nhs.uk
  3. alz.org
  4. wikipedia