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Cognitive function in diabetes mellitus.

J T Richardson1

  • 1Department of Human Sciences, Brunel University, Uxbridge, Middlesex, United Kingdom.

Neuroscience and Biobehavioral Reviews
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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Diabetes mellitus can affect the brain, with non-insulin-dependent diabetes showing more significant memory and learning impairments linked to blood sugar control. However, these cognitive issues rarely impact daily life.

Area of Science:

  • Neuroscience
  • Endocrinology
  • Metabolic Disorders

Background:

  • Diabetes mellitus involves metabolic abnormalities potentially linked to central nervous system degeneration.
  • Cognitive impairment is a known complication, but its characteristics vary between diabetes types.

Purpose of the Study:

  • To investigate the relationship between diabetes mellitus and cognitive function.
  • To differentiate cognitive deficits in insulin-dependent versus non-insulin-dependent diabetes.
  • To assess the impact of glycemic control on cognitive impairment.

Main Methods:

  • Review of postmortem studies on central nervous system changes in diabetes.
  • Analysis of cognitive effects of acute hypoglycemia and hyperglycemia.
  • Comparison of cognitive deficits in insulin-dependent diabetes mellitus (IDDM) and non-insulin-dependent diabetes mellitus (NIDDM).

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Main Results:

  • Acute hypoglycemia impairs cognition; acute hyperglycemia does not (without ketoacidosis/hyperosmolarity).
  • IDDM is linked to slight, inconsistent cognitive deficits, possibly psychogenic.
  • NIDDM shows more pronounced learning/memory deficits, correlated with glycemic control and potentially neuropathology.

Conclusions:

  • Cognitive impairment in diabetes is type-dependent.
  • NIDDM-related cognitive deficits are more consistently linked to neuropathology and glycemic control.
  • Despite deficits, significant impact on daily functioning is unlikely in both diabetes types.