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Thyroid Function and Cognition during Aging.

M E Bégin1, M F Langlois, D Lorrain

  • 1Research Center on Aging, Health and Social Services Centre, Sherbrooke Geriatrics University Institute, Sherbrooke, Quebec, Canada J1H 4C4.

Current Gerontology and Geriatrics Research
|May 6, 2009
PubMed
Summary
This summary is machine-generated.

Thyroid hormone levels, both high and low, can negatively impact cognitive function in older adults, affecting memory and attention. Even slight thyroid function changes within the normal range may significantly alter cognition in the elderly.

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Area of Science:

  • Gerontology
  • Endocrinology
  • Neuroscience

Background:

  • Thyroid hormones play a crucial role in brain function.
  • Age-related changes in thyroid function are common.
  • The relationship between thyroid function and cognition in aging is complex.

Purpose of the Study:

  • To review existing literature on the association between thyroid function and cognitive performance in aging adults.
  • To explore the impact of both hypothyroidism and hyperthyroidism on cognitive decline.
  • To investigate the effect of thyroid function variations within normal ranges on elderly cognition.

Main Methods:

  • Literature review of studies examining thyroid function and cognitive performance.
  • Analysis of data from middle-aged and elderly populations.
  • Synthesis of findings on cognitive domains affected by thyroid dysfunction.

Main Results:

  • Both hypothyroidism and hyperthyroidism are linked to reduced cognitive functioning in the elderly, particularly in memory, visuospatial skills, attention, and reaction time.
  • Mild thyroid function variations, even within normal limits, can significantly impact cognitive abilities in older individuals.
  • Cognitive deficits associated with thyroid issues may not follow a consistent pattern, and treatment outcomes can vary.

Conclusions:

  • Thyroid dysfunction (both high and low levels) is associated with cognitive impairment in aging.
  • Subtle thyroid function changes may have significant cognitive consequences in the elderly.
  • Further research is needed to clarify the complex relationship and optimize treatment strategies.