Altered Spontaneous Brain Activity in Type 2 Diabetes: A Resting-State Functional MRI Study
Open Access
- 16 January 2014
- journal article
- Published by American Diabetes Association in Diabetes
- Vol. 63 (2), 749-760
- https://doi.org/10.2337/db13-0519
Abstract
Previous research has shown that type 2 diabetes mellitus (T2DM) is associated with an increased risk of cognitive impairment. Patients with impaired cognition often show decreased spontaneous brain activity on resting-state functional magnetic resonance imaging (rs-fMRI). This study used rs-fMRI to investigate changes in spontaneous brain activity among patients with T2DM and to determine the relationship of these changes with cognitive impairment. T2DM patients (n = 29) and age-, sex-, and education-matched healthy control subjects (n = 27) were included in this study. Amplitude of low-frequency fluctuation (ALFF) and regional homogeneity (ReHo) values were calculated to represent spontaneous brain activity. Brain volume and cognition were also evaluated among these participants. Compared with healthy control subjects, patients with T2DM had significantly decreased ALFF and ReHo values in the occipital lobe and postcentral gyrus. Patients performed worse on several cognitive tests; this impaired cognitive performance was correlated with decreased activity in the cuneus and lingual gyrus in the occipital lobe. Brain volume did not differ between the two groups. The abnormalities of spontaneous brain activity reflected by ALFF and ReHo measurements in the absence of structural changes in T2DM patients may provide insights into the neurological pathophysiology underlying diabetes-associated cognitive decline.Keywords
This publication has 39 references indexed in Scilit:
- Microstructural White Matter Abnormalities and Cognitive Functioning in Type 2 DiabetesDiabetes Care, 2012
- Mapping the brain in type II diabetes: Voxel-based morphometry using DARTELEuropean Journal of Radiology, 2012
- Neural Networks, Cognition, and Diabetes: What Is the Connection?Diabetes, 2012
- Neurovascular Coupling in Cognitive Impairment Associated With Diabetes MellitusCirculation Journal, 2011
- Cerebral cortical thickness in patients with type 2 diabetesJournal of the Neurological Sciences, 2010
- A Prospective Analysis of Elevated Fasting Glucose Levels and Cognitive Function in Older PeopleDiabetes, 2010
- A 4 year follow-up study of cognitive functioning in patients with type 2 diabetes mellitusDiabetologia, 2009
- Long-Term Effect of Diabetes and Its Treatment on Cognitive FunctionThe New England Journal of Medicine, 2007
- Measurement of Brain Metabolites in Patients with type 2 Diabetes and Major Depression Using Proton Magnetic Resonance SpectroscopyNeuropsychopharmacology, 2006
- Cognitive decline and dementia in diabetes—systematic overview of prospective observational studiesDiabetologia, 2005