An elderly woman and younger woman sitting together and holding hands.

What is dementia?

Dementia is the gradual loss of cognitive functions due to brain damage. This disease causes the inability to perform daily living activities due to it affecting several skills:

  • Memory
  • Language (aphasia)
  • Attention
  • Visual
  • Praxis (performing intentional movements and gestures)
  • Functions such as problem-solving or inhibition of responses

As the disease progresses, loss of orientation and identity can also be observed.


Dementia is a serious condition due to it affecting brain cells. Depending on the patient's condition, their symptoms and causes may be treated. However, once brain cells have been destroyed, it’s not possible to replace them.

If it’s suspected that you or a family member may have dementia, seek medical help as soon as possible.

Symptoms of dementia

The main symptom of dementia is memory loss, although it can lead to other symptoms that can appear over time, or all at once:

  • Recent memory loss: It is a recurring symptom that people with dementia forget things, although they never remember them again. It is possible that, for example, a person suffering from this pathology cooks and forgets to serve the dish, or even forgets that she has prepared it.
  • Difficulty doing previously simple tasks: Simple tasks such as dressing can be a problem for a patient with dementia and they may forget that they have already done a task. Tying shoes or putting certain foods in the fridge can also be easy habits to forget.
  • Language problems: Forgetting simple words or using them the wrong way is common in people with dementia. Communication can be complicated.
  • Confusion of time and place: They can forget how they got to a certain place, how to go home or they can get lost in their own street.
  • Being distracted: It is true that everyone can be distracted, although people with dementia do it often and repeatedly.
  • Problems with abstract thinking: Forgetting what numbers are and how they are used can be a symptom of dementia.
  • Placing objects in the wrong places: Putting an iron in the fridge or bread in the washing machine, for example, are also habits that indicate that the person may suffer from dementia.
  • Personality changes: These patients tend to be irritable, suspicious, fearful or depressed because of the disease.
  • Changes in mood: they have sudden mood swings, they can go from being calm to crying inconsolably in a few minutes.
  • Loss of initiative: they become passive people, they may not want to go according to what places or see other people.

Medical tests to diagnose dementia

For the diagnosis of dementia, the specialist will perform a physical examination of the patient and review their symptoms. They may also perform complementary tests to find out if the dementia is caused by another disease. If so, they will assess the condition and carry out the most appropriate treatment.

What are the causes of dementia?

Dementia is caused by damage to brain cells and other diseases:

Some of the causes that can be stopped or reversed are brain injuries and tumours, long-term alcohol abuse, change in blood sugar and sodium levels, low levels of vitamin B12, normal pressure hydrocephalus, use of certain medications and brain infections.

Can it be prevented?

There is no specific method of prevention to avoid suffering from dementia. However, if a patient has suffered a head injury or brain tumour, they’ll be advised to see a specialist in addition to taking precautions to avoid additional trauma.

Treatments for dementia

Some causes of dementia can be treated but once brain cells have been destroyed they cannot be replaced. Treatment can delay or stop damage to brain cells, but it will always depend on the individual patient and their condition.

When the cause cannot be treated, treatment is based on helping the patient manage their daily activities and reducing the impact of symptoms. Some medications can help delay the progression of dementia - a specialist will determine the type of medication according to each particular case. There are several drugs that can help alleviate symptoms or slow the progression of dementia, although they will not fight it.

Which specialist treats dementia?

Specialists in psychiatry or neurology can diagnose and manage treatment for dementia.

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