Alzheimer's Disease : An Age-Old Story Of Dementia

The biology and epidemiology of Alzheimer’s disease.

Infographic by Mohamed Ashour

Alzheimer’s disease is a progressive neurodegenerative condition of the brain that is responsible for around two-thirds of dementia cases. Despite much effort, the condition’s cause remains uncertain and no effective treatment yet exists.


Subtle losses of memory or changes in behaviour are the first outward signs of Alzheimer’s disease. Slowly but relentlessly, cognition declines, language is disrupted and behavioural changes accumulate, diminishing a person’s independence. These changes are underpinned by both structural and microscopic changes in the brain.

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