25/08/2025
DEMENTIA
Dementia is a general term for a progressive decline in cognitive abilities such as memory, thinking, language, and problem-solving that is severe enough to interfere with daily life. It is caused by physical changes in the brain that damage nerve cells and their connections. Dementia is not a specific disease itself but rather a group of symptoms that can result from various diseases and injuries.
While it is more common in older people, dementia is not a normal or inevitable part of aging.
Common types of Dementia
1. Alzheimer's disease: This is the most common cause of dementia, accounting for 60% to 80% of cases. It is caused by abnormal protein buildups in the brain called plaques and tangles that damage and kill brain cells.
2. Vascular dementia: The second most common type, this is caused by damage to blood vessels in the brain that reduces blood flow. It can be triggered by a single major stroke or a series of smaller strokes over time.
3. Dementia with Lewy bodies (LBD): This is caused by abnormal deposits of a protein called alpha-synuclein, known as Lewy bodies, inside the brain's nerve cells. Symptoms can include fluctuating attention, hallucinations, and movement problems similar to Parkinson's disease.
4. Frontotemporal dementia (FTD): This group of disorders is caused by damage to the frontal and temporal lobes of the brain. It most often affects personality, behavior, and language skills, and tends to develop at a younger age (45–64) than other dementias.
5. Mixed dementia: This involves a combination of two or more types of dementia occurring simultaneously, most often Alzheimer's disease and vascular dementia.
Symptoms of Dementia
The symptoms of dementia vary depending on the area of the brain that is damaged. They can begin subtly and worsen progressively over time.
Common early symptoms include:
- Memory loss that affects daily life, such as forgetting recent events, conversations, or names.
- Difficulty with language, such as struggling to find the right words.
- Problems with problem-solving, planning, and organizing.
- Getting lost in familiar places.
- Changes in mood, behavior, or personality.
As dementia progresses, symptoms may become more severe and include:
- Increased confusion and disorientation.
- Significant personality changes and inappropriate behavior.
- Difficulty with daily tasks like dressing and bathing.
- Trouble with walking, balance, and other movements.
- Forgetting personal history, like one's own address.
- Hallucinations and delusions.
Causes and risk factors
The specific cause of dementia depends on the type, but risk factors include:
Age: The risk of dementia increases significantly with age, particularly after 65.
Genetics: Having a family history of dementia increases risk, though it is not a guarantee of developing the condition.
Cardiovascular health: Conditions like high blood pressure, high cholesterol, and diabetes that damage blood vessels can increase risk.
Lifestyle: Smoking, excessive alcohol use, and a lack of exercise and mental stimulation are associated with a higher risk of developing dementia.
Traumatic brain injury (TBI): Repeated head injuries, such as from sports or military service, can increase the risk of dementia later in life.
Diagnosis and treatment
To diagnose dementia, a doctor performs a medical history review, a physical exam, lab tests, and cognitive tests to evaluate memory and thinking skills. While most progressive dementias currently have no cure, some treatments can help manage symptoms, including:
Medications: Certain drugs can temporarily improve or stabilize cognitive symptoms.
Non-drug therapies: Mental health counseling, occupational therapy, and sp*ech therapy can help manage symptoms and improve daily functioning.
Supportive care: Providing a safe, structured environment and support for the person with dementia and their caregivers can greatly improve quality of life.