Dementia and Alzheimer’s disease are a common and devastating problem in society today.
Alzheimer’s disease is a progressive neurodegenerative disorder that primarily affects older adults, leading to memory loss, cognitive decline, and changes in behavior. It is the most common cause of dementia, accounting for 60–80% of cases. The disease begins with subtle lapses in memory, especially of recent events, and gradually worsens over time. As it progresses, individuals often experience confusion, difficulty with language and problem-solving, and eventually lose the ability to carry out daily activities independently. The exact cause isn’t fully understood, but it’s believed to involve a combination of genetic, environmental, and lifestyle factors that lead to the accumulation of amyloid plaques and tau tangles in the brain.
On a biological level, Alzheimer’s disease is marked by the degeneration and death of brain cells. Two key pathological hallmarks are amyloid-beta plaques—clumps of protein fragments that accumulate between neurons—and neurofibrillary tangles, which are twisted strands of the protein tau that build up inside cells. These abnormalities disrupt communication between neurons and trigger inflammation and cellular damage, ultimately leading to brain atrophy. The hippocampus, a region crucial for memory formation, is typically among the first areas affected. Imaging studies and cerebrospinal fluid analyses can help support a diagnosis, although a definitive diagnosis is usually made postmortem.
Currently, there is no cure for Alzheimer’s, but treatments exist to manage symptoms and potentially slow progression. Medications like cholinesterase inhibitors (e.g., donepezil) and NMDA receptor antagonists (e.g., memantine) can help improve cognition and behavior temporarily. Recent advances also focus on disease-modifying therapies that target amyloid-beta and tau directly, though their long-term effectiveness is still under investigation. Supportive care, including cognitive training, social engagement, and caregiver support, plays a huge role in maintaining quality of life. Early diagnosis and comprehensive care planning are key strategies in helping individuals and families cope with the disease’s progression.
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