Dementia is not a single disease. It is an umbrella term used to describe a range of symptoms that affect memory, thinking, communication, behaviour and perception, and which gradually interfere with everyday life.
Alzheimer’s disease is the most common cause of dementia, but there are over 200 different types. Each affects the brain in different ways and presents differently for each individual.
Dementia is becoming increasingly common worldwide. According to the Alzheimer’s Society, around 850,000 people are currently living with dementia in the UK, a figure expected to rise beyond one million in the coming years. While dementia is more common in later life, it is not an inevitable part of ageing.
Is Dementia a Normal Part of Ageing?
No. Dementia is not caused by normal ageing.
Ageing can bring occasional memory lapses, such as misplacing keys or struggling to find the right word, but dementia involves persistent and progressive changes that interfere with daily living.
Diagnosing dementia later in life can be complex due to several factors:
- Overlap with normal ageing
Some early symptoms may resemble age-related changes, making distinction harder.
- Other health conditions
Depression, delirium or medication side effects can mimic dementia symptoms.
- Variation in symptoms
Dementia affects everyone differently, depending on type and stage.
- Cognitive reserve
Some people function well for longer despite changes in the brain.
- Social and cultural factors
Stigma or assumptions about ageing can delay assessment or diagnosis.
Many people live into later life without ever developing dementia. Importantly, lifelong knowledge, language skills and long-term memories often remain intact for a long time.
At Aria Care, we actively invest in dementia education. Our Lifestyle Leads recently completed advanced dementia training, ensuring research-led, compassionate practice across our communities.
Symptoms and Signs of Dementia
Dementia symptoms vary widely from person to person and change over time. According to dementiauk.org, common signs may include:
Memory
- Increasing forgetfulness
- Difficulty retaining new information
- Getting lost in familiar places
- Misplacing items frequently
- Difficulty remembering names
Thinking and understanding
- Confusion about time or place
- Difficulty making decisions or managing money
- Reduced concentration
- Loss of interest in previously enjoyed activities
- Restlessness or pacing
Communication
- Difficulty finding the right words
- Repeating conversations
- Struggling to follow or maintain conversations
- Changes in reading or writing ability
Emotional and behavioural changes
- Withdrawal from social situations
- Reduced confidence
- Changes in mood or personality
- Anxiety or low mood
Source: dementiauk.org
These signs are not definitive on their own. Everyone’s experience of dementia is unique, and symptoms depend on the type of dementia and the areas of the brain affected.
What Causes Dementia?
Dementia is caused by damage to brain cells, which affects how they communicate with one another. This damage disrupts thinking, behaviour and emotional regulation.
Different conditions cause different types of dementia. For example;
- Alzheimer’s disease
Caused by abnormal protein build-up in the brain.
- Vascular dementia
Caused by reduced blood flow to the brain, often following a stroke.
The brain is made up of specialised regions responsible for memory, movement, language and reasoning. When one area is damaged, the functions it controls are affected.
What Increases the Risk of Dementia?
Risk factors can include:
- Head or brain injury
- Certain infections
- Long-term alcohol or substance misuse
- Genetic factors
- Poor cardiovascular health
- Physical inactivity
- Diet and lifestyle factors
Ongoing research continues to expand our understanding, including the role of:
- Genetics and genomics
- Inflammation and protein changes
- Environmental factors such as pollution
- Gut health and the microbiome
- Heart health and stroke prevention
Common Types of Dementia?
Alzheimer’s Disease
The most common cause of dementia. Early symptoms often include memory difficulties and confusion, with gradual progression to challenges with language, reasoning and daily activities. Long-term memory may remain intact for longer than short-term memory.
Vascular Dementia
Often linked to strokes or reduced blood flow to the brain. Symptoms may include difficulties with planning, attention and problem-solving. Progression can occur in steps rather than gradually.
Lewy Body Dementia
May involve movement changes similar to Parkinson’s disease, visual hallucinations, sleep disturbance and fluctuating alertness. Symptoms often vary day to day.
Frontotemporal Dementia (FTD)
Typically affects behaviour, personality and language. It often develops earlier than other types and may involve impulsivity or changes in social awareness.
Mixed Dementia
Occurs when more than one type of dementia is present, commonly Alzheimer’s and vascular dementia together. Symptoms reflect a combination of both.
Understand more about the different types of dementia in our knowledge hub.
Dementia Life Expectancy
There is no single life expectancy for dementia. It varies widely depending on:
- Type of dementia
- Age at diagnosis
- Overall health
- Presence of other conditions
- Quality of care and support
On average:
- Alzheimer’s disease: 4–8 years post-diagnosis, though some live much longer
- Vascular dementia: around 5 years
- Lewy body dementia: 5–8 years
- Frontotemporal dementia: 6–8 years
Early diagnosis, person-centred care and proactive health management can significantly improve quality of life.
Dementia Diagnosis and Treatment
There is no single test for dementia. Diagnosis is based on:
- Medical history
- Physical examinations
- Cognitive assessments
- Behavioural observations
- Input from family and friends
Whilst a general dementia diagnosis may be determined, it can be trickier to determine the exact type of dementia. In some cases, a type may never be diagnosed. The NHS (National Health Service) advice on how to get a dementia diagnosis is very comprehensive for anyone worried they or a loved one may be living with dementia.
While there is currently no cure, treatments and therapies can help manage symptoms. These may include medication, talking therapies, lifestyle support and personalised care approaches.
Dementia Care at Aria Care
At Aria Care, dementia care is built around people, not conditions.
Our approach includes:
- Personalised care plans tailored to each resident
- Specialist dementia-trained teams
- Safe, dementia-friendly environments
- Meaningful activities, including music, art and social connection
- Nutritious, flexible dining led by in-house chefs
- Consistent routines to reduce anxiety
- Strong family and community involvement
We focus on feelings, identity and wellbeing, supporting residents to live meaningful lives within our communities.
If you’d like to learn more about dementia care at Aria Care, we would be delighted to welcome you for a visit and show you what life in our communities can feel like.
