Cognitive impairment in nondiabetic middle-aged and older adults is associated with insulin resistance

To determine whether the cognitive impairments observed in adults with type 2 diabetes mellitus (T2DM) exist in preclinical disease, we compared 38 adult participants with evidence of insulin resistance (IR) to 54 age-, gender-, and education-matched control participants on a battery of neuropsychol...

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Bibliographic Details
Published in:	Journal of clinical and experimental neuropsychology 2010-06, Vol.32 (5), p.487-493
Main Authors:	Bruehl, H., Sweat, V., Hassenstab, J., Polyakov, V., Convit, A.
Format:	Article
Language:	eng
Subjects:	Adult and adolescent clinical studies Age Factors Aged Aging Biological and medical sciences Blood Glucose - metabolism Case-Control Studies Cognition Cognition Disorders - physiopathology Diabetes. Impaired glucose tolerance Endocrine pancreas. Apud cells (diseases) Endocrinopathies Etiopathogenesis. Screening. Investigations. Target tissue resistance Executive Function - physiology Female Glycated Hemoglobin A - metabolism Glycemic control Humans Insulin resistance Insulin Resistance - physiology Male Medical sciences Memory - physiology Middle Aged Neuropsychological Tests Organic mental disorders. Neuropsychology Psychology. Psychoanalysis. Psychiatry Psychopathology. Psychiatry Quantitative insulin sensitivity check index Sex Factors Type 2 diabetes
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Summary:	To determine whether the cognitive impairments observed in adults with type 2 diabetes mellitus (T2DM) exist in preclinical disease, we compared 38 adult participants with evidence of insulin resistance (IR) to 54 age-, gender-, and education-matched control participants on a battery of neuropsychological tests. We found that participants with IR had performance reductions in declarative memory and executive functioning. When we examined IR simultaneously with other biomedical indicators with which it co-occurs, only IR itself was associated with declarative memory, and hemoglobin A1c (HbA1c) was associated with executive functioning and working memory. We conclude that individuals with insulin resistance already demonstrate similar reductions in cognitive performance as those described in T2DM.
ISSN:	1380-3395 1744-411X