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Entorhinal cortex pathology in Alzheimer's disease
G W Van Hoesen1, B T Hyman, A R Damasio
1Department of Anatomy, University of Iowa, Iowa City 52242.
Hippocampus
|January 1, 1991
Summary
Alzheimer's disease pathology selectively targets the entorhinal cortex, a key brain region. Damage here likely contributes significantly to the memory loss characteristic of this neurodegenerative disease.
Area of Science:
- Neuroscience
- Neuropathology
Background:
- Alzheimer's disease (AD) pathology is selective but can become widespread in later stages.
- Understanding the initial sites of pathology is crucial for determining AD etiology.
- An experimental animal model is lacking for studying AD onset.
Purpose of the Study:
- To identify the invariant focus of pathology in Alzheimer's disease.
- To investigate the role of the entorhinal cortex in AD pathogenesis and memory deficits.
Main Methods:
- Analysis of pathological changes in Alzheimer's disease brains.
- Neuroanatomical studies in higher mammals.
Main Results:
- The entorhinal cortex (Brodmann's area 28) is an invariant focus of AD pathology.
- This region exhibits selective damage, affecting certain layers more than others.
- The entorhinal cortex is the most heavily damaged cortical area in Alzheimer's disease.
Conclusions:
- Destruction of the entorhinal cortex in AD plays a prominent role in memory deficits.
- The findings highlight the entorhinal cortex as a critical area for understanding AD onset and progression.