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Morphometric parameters of some hypothalamic nuclei: age-related changes

J Moryś1, J Dziewiatkowski, A Switka

  • 1Department of Anatomy, University School of Medicine, Gdańsk.

Folia Morphologica
|January 1, 1994
PubMed
Summary

Aging affects hypothalamic nuclei structure. Neuron nuclei shrink, particularly in the lateral tuberal nucleus (LTN), with increased neuron density observed in the LTN of older individuals.

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Area of Science:

  • Neuroscience
  • Aging Research
  • Neuroanatomy

Background:

  • The hypothalamus plays a crucial role in regulating vital physiological functions.
  • Age-related changes in hypothalamic structure may contribute to functional decline.
  • Specific hypothalamic nuclei, including the supraoptic (SON), lateral tuberal (LTN), and lateral mammillary (LMN) nuclei, are key areas of interest.

Purpose of the Study:

  • To investigate age-related morphometric changes in specific hypothalamic nuclei.
  • To compare neuronal and nuclear morphology between younger and older adult subjects.

Main Methods:

  • Morphometric analysis was conducted on hypothalamic nuclei from 20 human brains (aged 29-79 years).
  • Subjects were divided into two age groups: below 60 years and above 60 years.

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  • Investigated nuclei included the supraoptic nucleus (SON), lateral tuberal nucleus (LTN), and lateral mammillary nucleus (LMN).

    • Main Results:

    • A decrease in neuron nuclei cross-sectional area was observed in all investigated nuclei in the aged group.
    • This decrease was most pronounced in the lateral tuberal nucleus (LTN).
    • A significant increase in neuron density was found in the lateral tuberal nucleus (LTN) with aging.
    • Neuron cell body size and total neuron number remained largely unchanged with age.

    Conclusions:

    • Aging leads to significant alterations in the morphometry of hypothalamic nuclei, particularly affecting neuron nuclei size and density.
    • The lateral tuberal nucleus (LTN) exhibits pronounced age-related changes, suggesting a potential vulnerability to aging processes.
    • These findings contribute to understanding the neurobiological basis of aging and hypothalamic function.