Neurofibrillary tangles and Lewy bodies in neurons

Physiological

Gender

Male

Data Availability

Period at which this change occurs is not accurately known

Tissue

  • brain Changes

References

Referencing provided by LibAge

External Links

Description

Neurofibrillars tangles and senile plaques are present in the brains of non-demented individuals. In normal ageing, the numbers of tangles, which occupy the cell body of affected neurons is relatively low and restricted to the hippocampus, amygdala and entorhinal cortex. Minimal neurofibrillary tangles are present in the transentorhinal region of individuals in middle and late life. The average tangle concentration increases exponentially with age. In contrast, amyloid plaques were absent in some brains up to age 88, and the earliest plaque formation in other cases occurred in the neocortex, in patches of diffuse plaques.