Alzheimer’s Dementia, Act Before Memory Fades – The Most Common Type of Dementia

Dementia is a general term to describe a decline in mental capacity that is severe enough to interfere with daily life. The brain cells of people with dementia die at a faster than normal, leading them to lose their ability to remember, think and reason.

A Rising Health Issue
A Well-Being of the Singapore Elderly (WiSE) study conducted in 2013 found that, in 2012, 10% of the elderly population or 28,000 people aged 60 years and above had dementia. This study was spearheaded by the Institute of Mental Health, Singapore.


Main Type of Dementia

Alzheimer’s dementia is the most common type of dementia and accounts for about 60% of all cases. This type of dementia causes progressive loss of brain cells with the formation of insoluble proteins in and around the brain cells. The onset of this condition is gradual, and early symptoms may be missed.

As the condition advances, people with dementia may demonstrate personality and behavioural changes which impede their daily life activities. While the likelihood of having dementia increases with age, it is not a condition related to normal ageing.


Other Types of Dementia

There are also other forms of dementia, including Vascular dementia, Lewy body dementia and Parkinson’s disease dementia.

Vascular dementia is the second most common type of dementia. It is a result of impaired blood flow to the brain, often after a stroke or series of strokes.


Three Stages of Alzheimer’s Dementia

It is not always easy to recognise the symptoms of Alzheimer’s dementia as they can be confused with normal ageing. For instance, it is normal to forget where one has placed his or her keys, but if the poor memory is associated with dementia, it will persist and worsen over time.

Dr Seng Kok Han advises that medical consultation should be sought if one displays the following signs and symptoms:


Early Stage: Mild Alzheimer’s Disease

At the early stage of Alzheimer’s, a person can still function independently and carry on with day-to-day activities. However, performing complex activities will be impaired.

  • Cannot manage finances
  • Unable to perform duties at work
  • Poor memory of recent events
  • Missing appointments
  • Word-finding difficulties
  • Misplacing everyday items from time to time
  • Spending more time than usual to complete daily tasks
  • Personality changes (e.g. declining motivation, social withdrawal, becoming more irritable)


Middle Stage: Moderate Alzheimer’s Disease

A greater level of care and attention has to be given at this stage.

  • Memory lapses are more common and obvious
  • Losing track of time and events
  • Wandering and getting lost
  • Dependent on others in managing finances, shopping or transportation
  • Neglecting themselves (e.g. need to be reminded to bathe and dress appropriately)
  • Becoming irritable and agitated
  • Hallucinations such as hearing voices and seeing visions
  • Delusions such as false beliefs that people stole their belongings


Late Stage: Severe Alzheimer’s Disease

At the final stage of the disease, patients are totally dependent on others for basic activities such as dressing, bathing, toileting and eating.

  • Difficulty recognising family members
  • Language is restricted or loss of speech
  • Loss of continence and mobility
  • Constant supervisions are required



Assessment of dementia involves detailed medical record-keeping, physical examination, cognitive testing, blood investigations, and brain imaging.


Benefits of Early Intervention

Although there is no cure for Alzheimer’s dementia, early diagnosis enables patients and caregivers to have a better understanding of their condition and receive anticipatory guidance for emerging symptoms. They can also plan for the future, such as making a Will and Lasting Power of Attorney (LPA) while they still have the mental capacity. Early intervention can slow down the progression of cognitive decline, prolong patients’ ability to carry out their daily activities and delay the need to place the patient in institutional care.


Preventive Measures to Slow Down the Deterioration of Brain Cells

  • Having adequate rest and sleep
  • Having a balanced diet of more fruits, vegetables and fish
  • Consuming less sugar and salt
  • Exercising regularly
  • Avoiding smoking
  • Maintaining good control of blood pressure, diabetes and cholesterol
  • Managing existing medical conditions well by seeking treatment and taking medications dutifully
  • Engaging in mentally stimulating activities such as keeping up with current affairs, lifelong learning, playing mahjong and doing crossword puzzles
  • Building positive relationships by having frequent interactions with family members and friends


Comprehensive Care to Manage Dementia Patients

Dr Seng Kok Han outlines the following approaches in which doctors, family members, caregivers and the community all play a part in helping patients with dementia cope with the illness.


Prescribed medications such as Donepezil, Rivastigmine, Galantamine or Memantine can slow down the progression of the illness. Antidepressants can be used to treat depression while antipsychotics can help manage hallucinations and paranoia, which can be seen in dementia.

Psychological Support

Psychological approaches include helping to orientate patients (reality orientation) and to help them focus on meaningful activities of the past (reminiscence therapy). Cognitive training can equip them with skills to decrease everyday problems and improve the quality life. Behavioural modifications are applied to help patients change specific challenging behaviours.

Social Interventions

It is important to work with family members as they play contributory roles in influencing treatment outcomes and management. Referring patients to appropriate agencies such as daycares, befriender services and family service centres can help in the aftercare.

Dr Seng Kok Han concludes, “Early diagnosis and intervention allows patients with dementia to slow down the progress of cognitive decline and prolong the joy of spending quality time with their loved ones.”


10 Questions to Check Your Memory

  1. Do you lose things frequently or suspect that someone has stolen them?
  2. Do your family members complain that you repeatedly ask the same questions?
  3. Do you struggle to remember words, appointments or information that you have learnt recently?
  4. Do you feel lost in a conversation?
  5. Do you have difficulty following instructions?
  6. Do you have difficulty recognising people or remembering their names?
  7. Do you lose your way in a familiar place?
  8. Do you struggle to keep track of finances or pay bills on time?
  9. Do you have difficulties in taking your long-term medications correctly and regularly?
  10. Do you or others notice changes in your personality, such as becoming easily upset or anxious?


Even if you have answered “Yes” to most of the questions, fret not! Early diagnosis and intervention allows patients with dementia to slow down the progress of cognitive decline and prolong the joy of spending quality time with their loved ones. The surest way for an accurate diagnosis is to consult a doctor.


Dr Seng Kok Han

Consultant Psychiatrist, Nobel Psychological Wellness Centre

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Dr Seng Kok Han is a Consultant Psychiatrist from Nobel Psychological Wellness Clinic, a member of Healthway Medical Group. Dr Seng is experienced in treating mood disorders such as depression, bipolar disorder and psychotic disorders such as schizophrenia. He also treats insomnia, anxiety, stress-related disorders and dementia.