Cited by 643Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Neuropathology and Cognitive Impairment in Alzheimer Disease: A Complex but Coherent Relationship

Open access
Nelson, Peter T., Braak, Heiko, Markesbery, William R.·2009·Journal of Neuropathology & Experimental Neurology

Abstract

Amyloid plaques and neurofibrillary tangles (NFTs) are the pathological hallmarks of Alzheimer disease (AD). There is controversy regarding the use of current diagnostic criteria for AD and whether amyloid plaques and NFTs contribute to cognitive impairment. Because AD is specific to humans, rigorous and comprehensiveclinicopathologic studies are necessary to test and refine hypotheses of AD diagnosis and pathogenesis. Neither the clinical nor the pathological aspects of AD evolve in a linear manner, but thepredictable sequence of AD pathology allows for stage-based correlations with cognitive deterioration. We discuss subsets of patients with clinical dementia who lack amyloid plaques and NFTs and, conversely, whether individuals without antemortem cognitive impairment can harbor severe AD-type pathological findings at autopsy. There are many medical, technical, and anatomical challenges to clinicopathologic studies in AD. For example, at least two thirds of persons older than 80 years have non-AD brain diseases that can effect on cognitive function. We argue that existing data strongly support the hypothesis that both amyloid plaques and NFTs contribute to cognitive impairment.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1097/nen.0b013e3181919a48

Cites

155 of 155 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The accumulation of senile plaques and neurofibrillary tangles causes synaptic dysfunction, synapse loss, and eventual neuronal death.

    “leading to dysfunction and loss of synapses and eventual neuronal death1,2.”

    From Oxidative stress, dysfunctional glucose metabolism and Alzheimer disease (2019) · cites this paper as [1]

    In “The Neuritic Plaque: A Pathological Entity With Strong Mechanistic Implications” (page unavailable), the paper says neuritic plaques involve degenerating nerve-cell processes and that amyloid plaque pathology induces neurofibrillary pathology and apparent structural and functional disruption. In “Nonlinear clinicopathological correlations” (page unavailable), it suggests these changes may impair function before cell death. It does not establish the claimed sequence of synaptic dysfunction, synapse loss, and eventual neuronal death as a definite consequence of plaque and tangle accumulation. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Alzheimer disease is characterized by brain accumulation of senile plaques, composed mainly of fibrillary amyloid beta-peptide and dystrophic neurites, and neurofibrillary tangles, composed of hyperphosphorylated tau.

    “AD is characterized by an accumulation of senile plaques (SP) [composed mostly of fibrillary amyloid beta-peptide (Aβ) and dystrophic neurites] and neurofibrillary tangles (NFT) [composed of hyperphosphorylated tau protein] in the brain”

    From Oxidative stress, dysfunctional glucose metabolism and Alzheimer disease (2019) · cites this paper as [1]

    Table 1 and the Figure 1 caption (both indexed under Summary and Conclusions; page unavailable) describe AD amyloid plaques as having a fibrillary amyloid-peptide core and neuritic plaques as surrounded by degenerating neurites. The caption says neurofibrillary tangles are composed of tau fibrils, but the available passages do not specify that the tau is hyperphosphorylated. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • Alzheimer disease clinically involves progressive cognitive decline with memory loss and impaired higher executive function.

    “Clinically, AD is characterized by several features, notably a progressive cognitive decline involving loss of memory and higher executive functioning1.”
  • Evaluation of AD status was conducted using National Institute on Aging Reagan Institute guidelines including evaluation of neurofibrillary tangles and neuritic senile plaques.

    “Evaluation of AD status was conducted by the AD Center Neuropathology and Clinical Cores using guidelines set forth by the National Institute on Aging Reagan Institute that included evaluation of neurofibrillary tangles and neuritic senile plaques [36–38].”
  • The earliest pathological damage to neurons in Alzheimer disease and amnestic mild cognitive impairment occurs at pre- and post-synaptic membranes.

    “Indeed, the first pathological insults to neurons in AD and aMCI occur at pre- and post-synaptic membranes1,3.”

    From Oxidative stress, dysfunctional glucose metabolism and Alzheimer disease (2019) · cites this paper as [1]

    The discussion of early Alzheimer pathology describes where plaques and neurofibrillary tangles appear in the brain, but does not identify pre- or postsynaptic membranes as the sites of the first neuronal insults. Searches for synapses, synaptic membranes, and early damage in Alzheimer disease and mild cognitive impairment found no passage in our copy establishing that claim. (LLM, conf=0.72)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 2

  1. Braak H, Braak E. Staging of Alzheimer's diseaseYrelated neuro- fibrillary changes. Neurobiol Aging 1995;16:271Y8;[discussion 8-84]
  2. Centers for Disease Control and Prevention. Prevalence of strokeV United States, 2005. MMWR Morb Mortal Wkly Rep 2007;56: 469Y74

Cited by

Sorted by citations

Authors
Nelson, P. T., Braak, H., & Markesbery, W. R.
Affiliations
  • University of Kentucky HealthCare (US)
  • University of Kentucky (US)
Corresponding author
Nelson, Peter T.
Venue
Journal of Neuropathology & Experimental Neurology
Published
2009-01
Volume
68
Issue
1
Pages
1-14
ISSN
  • 0022-3069 (ISSN-L)
  • 1554-6578
OpenAlex
W1985747467
Cited by
643
References
155
Citations by year
2026: 21 · 2025: 43 · 2024: 48 · 2023: 46 · 2022: 33 · 2021: 45 · 2020: 44 · 2019: 33 · 2018: 32 · 2017: 32 · 2016: 37 · 2015: 32 · 2014: 35 · 2013: 42 · 2012: 41
FWCI
2.81
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuropathology & Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • National Institutes of Health (AG028 383)
  • National Institute on Aging (P30AG028383)
  • National Institute of Neurological Disorders and Stroke (R01NS061933, K08NS050110)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Alzheimer's disease, amyloid plaques, neurofibrillary tangles, cognitive impairment, clinicopathological correlation, Alzheimer's disease diagnosis, Alzheimer disease pathogenesis, autopsy findings
MeSH terms
Alzheimer Disease, Cognition Disorders, Humans, Neurofibrillary Tangles, Plaque, Amyloid

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review