Open Book

This blog is intended for general information. It is not a substitute for professional medical advice. This blog helps you seek professional care promptly.

Forgetfulness is a familiar companion of aging. We all misplace a wallet, forget an appointment, or tell a story twice, perhaps even three times. These are natural slips of memory. Yet, sometimes what begins as mild forgetfulness evolves into a deeper issue. It becomes a persistent decline in memory, reasoning, and emotional balance. This decline starts to significantly interfere with daily life. That is when ordinary forgetfulness becomes a warning sign.

What is Dementia?

Dementia, in its simplest sense, is the loss of memory. It is not a disease but a symptom that can be caused by many different diseases. Think of Dementia as a fever. Fever can be caused by several conditions. These include injury, infection, inflammation, or stress. It signals that something is wrong in the body. In the same way, Dementia is a signal that something deeper needs attention.

Dementia symptoms can include memory loss, confusion, changes in language, reasoning, or behaviour, severe enough to affect daily functioning. These symptoms arise from different diseases. Some involve only memory, while others disrupt reasoning, mood, and the ability to carry out familiar tasks.

What Causes Dementia?

Alzheimer’s disease is the most common cause, accounting for almost seventy per cent of all cases worldwide.

We still do not fully understand what triggers this illness, nor do we yet have a cure. In Alzheimer’s disease, memory, language, and judgment decline. What starts with misplacing a key can progress to not understanding what a key is. It may even lead to not knowing who is offering it. The disease spreads silently through brain areas responsible for speech, movement, and emotion. It turns familiar routines into daily challenges. According to the latest global estimates, Alzheimer’s disease accounts for nearly two out of every three cases of Dementia worldwide.

Alzheimer’s disease doesn’t erase who we are overnight. It rewires the brain’s pathways, quietly redrawing the map of the self. Recognising it early gives families time — time to plan, to adapt, and to love differently.

Other diseases can cause Dementia

Vascular Dementia occurs when small strokes or reduced blood flow damage the brain.

• Lewy body dementia is caused by clumps of abnormal protein. These clumps disturb movement, alertness, and sleep. They often lead to vivid dreams or visual hallucinations.
• Fronto temporal Dementia strikes younger adults more often than other types, first altering personality and language before memory loss appears.
• Mixed Dementia involves more than one cause. These causes act together, for example, Alzheimer’s joined with vascular damage. It can even involve psychological issues like depression.

Not every memory lapse signals permanent decline. Occasionally, dementia-like symptoms caused by treatable conditions like thyroid imbalance, medication side effects, or vitamin B12 deficiency are reversible.That is why early medical evaluation is critical.

Scientists around the world continue to emphasise an important point. This includes research teams in India. Dementia is not a normal part of aging. It must be tested in time. Age increases the risk, but it does not cause the disease. As people live longer, the likelihood increases. So, Dementia remains a condition that demands diagnosis, not dismissal.

Diagnosing the Difference – The Context Matters

Families often ask, “Is it dementia or Alzheimer’s?” The answer lies in assessment, not assumption.

A proper diagnosis requires medical evaluation. This involves a sequence of observations and tests. These tests separate ordinary forgetfulness from disease. They also distinguish Alzheimer’s from other forms of Dementia.

No single test defines Dementia. The diagnosis results from a careful synthesis of information. This includes medical history, neurological findings, cognitive performance, and imaging results. It depends on the whole person: a patient’s mood, daily habits, education level, and family background. Sometimes, what appears to be memory loss or confusion is not Dementia at all.

A thorough dementia evaluation always begins with blood tests to rule out reversible causes. It progresses to targeted antibody panels when clinically indicated. The evaluation also uses standardised cognitive assessments like the Addenbrooke’s. These assessments help characterise the pattern and severity of cognitive deficits. Such investigations help rule out conditions that may look similar but are reversible. These tests pinpoint the cause and guide families towards prompt planning and treatment. The following investigations form part of a standard diagnostic work-up:

Blood Tests for Reversible Causes

These are simple, yet powerful tests. They help detect metabolic or nutritional imbalances, which mimic or worsen cognitive decline. When corrected early, they can halt or even reverse cognitive symptoms.

• Vitamin B₁₂ and Vitamin D Levels – These can affect the brain and nervous system. They may cause forgetfulness, poor concentration, low mood, or impaired cognition.
• Thyroid Function Tests (TFTs) – An underactive or overactive thyroid can slow thinking or trigger anxiety and restlessness. The Thyroid Antibody Test can detect autoimmune thyroiditis (such as Hashimoto’s or Graves’ disease).
• Autoimmune and Paraneoplastic Screening.  In selected cases, when Dementia develops rapidly or atypically—especially in younger patients or those with neurological fluctuations, identification is crucial. Many autoimmune and paraneoplastic encephalopathies are potentially reversible with immunotherapy or treatment of an underlying tumour. Rapid or fluctuating symptoms always deserve detailed evaluation.
• Detailed Cognitive Function Assessment. These tests evaluate the brain’s ability to handle memory, language, attention, reasoning, and spatial skills. Among the most comprehensive tools is the Addenbrooke’s Cognitive Examination (ACE-III), which is widely used worldwide. It helps clinicians differentiate between:
  • Alzheimer’s Disease
• • Frontotemporal Dementia
• • Vascular Dementia
  • Mild Cognitive Impairment (MCI)

Help for early detection

Early detection matters deeply. It provides clarity when behaviour changes create confusion or guilt within families. It allows access to treatments that can slow disease progression and improve quality of life. Most importantly, early diagnosis buys time. It provides time to organise finances. It ensures safety. It allows for planning long-term care with dignity and compassion.

Globally, Alzheimer’s Disease International (ADI) has urged governments through its “From Plan to Impact” reports. They encourage embedding dementia screening and caregiver support in national health systems. Early identification and community-based care can significantly reduce the long-term social and economic burden.

In India, the Alzheimer’s and Related Disorders Society of India (ARDSI) has trained hundreds of doctors and community health workers. They are trained to recognise early warning signs. This initiative integrates dementia awareness into public health programmes. The Karnataka State Dementia Action Plan (2019) was developed by ARDSI in collaboration with the Government of Karnataka state. It was India’s first state-level strategy. This plan aims to strengthen dementia diagnosis and community support systems.

Knowing the Difference Isn’t Just Science — It’s Compassion.

In the end, Dementia is not simply about forgetting; it is about remembering differently. The illness reshapes memory, but it does not destroy the capacity for emotion, love, or connection. People living with Dementia may lose the thread of time. Still, they often hold on to the rhythm of affection. This is a familiar song, a gentle touch, or a warm voice. These can stir recognition even when names fade.

For families, this shift demands patience and creativity. Communication becomes less about facts and more about feelings. A mother may no longer recall her daughter’s name but still recognises the comfort in her presence. A husband who can’t remember a conversation may still reach instinctively for his wife’s hand. Through gestures, music, rituals, and routines, families rediscover meaning even as memory changes shape.

Across cultures, caregivers describe the same paradox — grief and grace intertwined. A son follows his father at night as he wanders, searching for the school he once taught in. A wife reintroduces herself each morning, saying softly, “I’m Maria, your wife, and I love you.” A neighbour calms an elderly woman waiting for her long-deceased parents by simply making tea and listening to her. Each of these moments, though small, is an act of profound human care giving.

Dementia reminds us to see beyond symptoms to the person within. As Alzheimer’s Disease International reminds the world through its global campaign, “Never too early, never too late.”

Early action provides time to prepare; compassion transforms that time into quality of life. The goal is not only to add years to life. It’s also to add life to those years. This continues until science finds a cure. Additionally, society must learn to care openly, without fear or stigma.

References

• Alzheimer’s Disease International (2023). From Plan to Impact V: Progress towards national dementia policies around the world. London: ADI.
• Alzheimer’s & Related Disorders Society of India (2019). Karnataka State Dementia Action Plan. Bangalore: ARDSI.
• World Health Organization (2021). Global Status Report on the Public Health Response to Dementia. Geneva: WHO.
• Kumar, A. A. (2024). Clinical Notes on Memory Disorders and Diagnostic Approach. Amrita School of Medicine Archives.
• Kumar, A. A. (2024). Clinical notes on memory disorders and diagnostic approach. Amrita School of Medicine Archives.
• Petersen, R. C. et al. (2018). “Mild Cognitive Impairment: Clinical Characterisation and Outcome.” Archives of Neurology.
• ADI & WHO (2017). Global Action Plan on the Public Health Response to Dementia 2017–2025. Geneva: WHO.