Cited by 1,380Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

The topographical and neuroanatomical distribution of neurofibrillary tangles and neuritic plaques in the cerebral cortex of patients with Alzheimer's disease

Arnold, S. E., Hyman, B. T., Flory, J., Damasio, A. R., Van Hoesen, G. W.·1991·Cerebral Cortex

Abstract

The distribution of neurofibrillary tangles (NFTs) and neuritic plaques (NPs) was mapped in 39 cortical areas of 11 brains of patients with Alzheimer's disease (AD). Whole hemisphere blocks were embedded in polyethylene glycol (Carbowax), sectioned coronally, and stained with thioflavin S and thionin. The densities of NFTs and NPs were assessed using a numerical rating scale for each area. Scores were grouped by type of cortex and by lobe for statistical analysis. Highly significant differences were obtained. For example, limbic periallocortex and allocortex had more NFTs than any other type of cortex. In descending order, the density of NFTs was as follows: periallocortex (area 28) greater than allocortex (subiculum/CA1 zones of hippocampal formation, area 51) greater than corticoid areas (accessory basal nucleus of amygdala, nucleus basalis of Meynert) greater than proisocortex (areas 11, 12, 24, 23, anterior insula, 38, 35) greater than nonprimary association cortex (32, 46, superior temporal sulcus, 40, 39, posterior parahippocampal cortex, 37, 36) greater than primary sensory association cortex (7, 18, 19, 22, 21, 20) greater than agranular cortex (44-5, 8, 6, 4) greater than primary sensory cortex (41-2, 3-1-2, 17). The laminar distribution of NFTs tended to be selective, involving primarily layers III and V of association areas and layers II and IV of limbic periallocortex. There were far more NFTs in both limbic and temporal lobes than in frontal, parietal, and occipital lobes. In general, NPs were more evenly distributed throughout the cortex, with the exceptions of limbic periallocortex and allocortex, which had notably fewer NPs than other cortical areas. Temporal and occipital lobes had the highest NP densities, limbic and frontal lobes had the lowest, and parietal lobe was intermediate. No significant left-right hemispheric differences for NFT or NP densities were found across the population, and there was no relationship between duration of illness and densities of NFTs or NPs. The regional and laminar distribution of NFTs (and, to a lesser degree, that of NPs) suggests a consistent pattern of vulnerability within the cerebral cortices that seems correlated to the hierarchies of cortico-cortical connections. The higher-order association cortices, especially those in the anterior and ventromedial sectors of temporal lobe, are the most vulnerable, while other cortices appear less vulnerable to a degree commensurate with their connectional "distance" (i.e., synapses removed) from the limbic areas.

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Crossref · 10.1093/cercor/1.1.103

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  • The entorhinal cortex is affected severely in Alzheimer disease, likely contributing to memory impairment.

    “The EC is affected severely in Alzheimer disease (AD), likely contributing to memory impairment.”
  • The entorhinal cortex is highly selectively vulnerable in AD.

    “The EC was chosen because it is highly selectively vulnerable in AD (Hyman et al., 1984(Hyman et al., , 1986;;Arnold et al., 1991;Braak and Braak, 1991;Price et al., 1991;Arriagada et al., 1992a;Fukutani et al., 1995;Solodkin and Van Hoesen, 1996).”
  • The midfrontal gyrus cortex was chosen because of its important role in complex cognition and its common neuropathological involvement in Alzheimer's disease.

    “The midfrontal gyrus cortex (corresponding predominantly to Brodmann area 46) was chosen for semi-quantitative image analyses of AD pathology, cellular and synaptic markers because of its important role in complex cognition and its common neuropathological involvement in the spectrum of AD (Arnold, et al., 1991).”
  • The medial temporal lobe is the first area of the brain involved by the neurofibrillary pathology of Alzheimer's disease.

    “as this region is the first area of the brain involved by the neurofibrillary pathology of AD(4, 5).”
  • Most brains from elderly human subjects show abnormalities that fall somewhere along particular continua of pathologic severity.

    “We consider it to be an important clue that most brains from elderly human subjects show abnormalities that fall somewhere along particular continua of pathologic severity (60, 96-100).”

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Authors
Arnold, S. E., Hyman, B. T., Flory, J., Damasio, A. R., & Van Hoesen, G. W.
Affiliations
University of Iowa (US)
Venue
Cerebral Cortex
Published
1991-01-01
Volume
1
Issue
1
Pages
103-116
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2029923284
Cited by
1,380
References
0
Citations by year
2026: 15 · 2025: 32 · 2024: 32 · 2023: 34 · 2022: 31 · 2021: 45 · 2020: 36 · 2019: 41 · 2018: 47 · 2017: 43 · 2016: 42 · 2015: 40 · 2014: 42 · 2013: 54 · 2012: 42
FWCI
19.40
Type
journal article
Language
en
Open access
closed
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Public Health Service (P019632)
  • National Institute on Aging (AG-08487)
  • National Institute of Neurological Disorders and Stroke (R01NS014944, NS-14944)
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, neurofibrillary tangles, neuritic plaques, cortical topography, neuroanatomy, allocortex, temporal lobe, occipital lobe, frontal lobe, parietal lobe, laminar distribution, thioflavin S, thionin, amygdala, nucleus basalis of Meynert
MeSH terms
Aged, Alzheimer Disease, Brain Mapping, Cerebral Cortex, Female, Histocytochemistry, Humans, Male, Middle Aged, Neurites, Tissue Embedding, Neurofibrillary Tangles

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