Short answer · Medically reviewed summary · Last updated: 2026-05-08
Alzheimer's disease was first described in 1906 by German psychiatrist Alois Alzheimer, who identified the condition’s signature brain plaques and tangles in a patient named Auguste Deter. Since its discovery, our understanding of Alzheimer's disease has evolved from viewing it as a rare form of "presenile dementia" to recognizing it as the most common cause of neurodegenerative dementia worldwide. When and how was Alzheimer's disease first identified? In 1901, Dr.
What is the history of Alzheimer's Disease?
History of Alzheimer's Disease: when and how it was discovered, and the milestones in research since, medically reviewed.
Alzheimer's disease was first described in 1906 by German psychiatrist Alois Alzheimer, who identified the condition’s signature brain plaques and tangles in a patient named Auguste Deter. Since its discovery, our understanding of Alzheimer's disease has evolved from viewing it as a rare form of "presenile dementia" to recognizing it as the most common cause of neurodegenerative dementia worldwide.
When and how was Alzheimer's disease first identified?
In 1901, Dr. Alois Alzheimer began treating a 51-year-old woman, Auguste Deter, who exhibited progressive memory loss and cognitive decline. After her death in 1906, his microscopic examination of her brain revealed the presence of amyloid plaques and neurofibrillary tangles. This landmark clinical presentation effectively defined Alzheimer's disease as a distinct neuropathological entity, separating it from general age-related cognitive decline.
How has our understanding of Alzheimer's disease evolved?
For decades, Alzheimer's disease was considered a rare condition affecting only younger people. It was not until the 1970s and 1980s, through the work of Dr. Robert Katzman and others, that the medical community recognized that the brain changes seen in Alzheimer's disease were identical to those found in the vast majority of elderly patients with "senile dementia." This shift transformed the condition from a psychiatric curiosity into a global public health priority.
What are the major milestones in the study of Alzheimer's disease?
- 1906: First clinical and pathological description by Alois Alzheimer.
- 1984: Discovery of the beta-amyloid protein, a key component of plaques.
- 1990s: Identification of genetic mutations (APP, PSEN1, PSEN2) linked to early-onset familial Alzheimer's disease.
- 2021-2023: The FDA approval of monoclonal antibody therapies that target amyloid-beta, marking a shift toward disease-modifying treatments.
How have technology and genetics changed our perspective?
Modern neuroimaging, such as PET scans and advanced MRI, now allows clinicians to visualize Alzheimer's disease biomarkers in living patients, moving away from relying solely on post-mortem diagnosis. Additionally, genetic research has identified the APOE-e4 allele as a significant risk factor, helping researchers move toward precision medicine and early intervention strategies.
Next steps
- Consult a neurologist or geriatrician to discuss cognitive concerns and potential diagnostic testing.
- Join the DiseaseMaps community to connect with the 28 members who are navigating life with Alzheimer's disease.
- Visit the Alzheimer’s Association website to stay updated on emerging clinical trials and local support resources.
Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.
References
- National Institute on Aging (NIA): Alzheimer's Disease Fact Sheet
- NIH Genetic and Rare Diseases Information Center (GARD)
- OMIM (Online Mendelian Inheritance in Man): Entry #104300
- Alzheimer's Association: History of Alzheimer's Disease
