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Related Experiment Videos

Relationship between hyperglycemia and cognitive function in older NIDDM patients.

G M Reaven1, L W Thompson, D Nahum

  • 1Department of Medicine, Stanford University School of Medicine, Palo Alto, California.

Diabetes Care
|January 1, 1990
PubMed
Summary

Elderly individuals with non-insulin-dependent diabetes mellitus (NIDDM) show cognitive impairments in complex tasks. Poorer metabolic control in diabetic patients correlates with worse performance on learning and reasoning tests.

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Area of Science:

  • Gerontology
  • Neuroscience
  • Endocrinology

Background:

  • Non-insulin-dependent diabetes mellitus (NIDDM) is prevalent in the elderly population.
  • Cognitive function is crucial for maintaining independence in older adults.
  • The impact of NIDDM on cognitive health in well-functioning elderly individuals requires further investigation.

Purpose of the Study:

  • To investigate the nature and extent of cognitive impairment in elderly individuals with NIDDM.
  • To compare cognitive performance between diabetic and non-diabetic elderly subjects.
  • To explore the relationship between metabolic control and cognitive function in diabetic elderly individuals.

Main Methods:

  • Cognitive assessment using measures of verbal learning, abstract reasoning, and psychomotor functioning.

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  • Comparison of performance between 29 healthy elderly subjects with NIDDM and 30 demographically similar non-diabetic controls.
  • Analysis of the correlation between metabolic control (e.g., HbA1c) and cognitive performance within the diabetic group.

    • Main Results:

    • Diabetic subjects performed significantly worse on tasks assessing verbal learning, abstract reasoning, and complex psychomotor functioning compared to non-diabetic controls.
    • No significant differences were observed in simple verbal abilities or pure motor speed between the groups.
    • Within the NIDDM group, poorer metabolic control was associated with deficits in learning, reasoning, and complex psychomotor performance.

    Conclusions:

    • Elderly individuals with NIDDM, even those functioning well, are likely to exhibit greater cognitive deficits in complex processing compared to healthy non-diabetic peers.
    • Cognitive impairment in NIDDM may affect higher-order cognitive functions rather than basic abilities.
    • Metabolic control plays a role in cognitive function among elderly individuals with NIDDM, highlighting the importance of diabetes management for brain health.