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My group is interested in understanding the effects of obesity and diabetes on the brain, particularly related to cerebral function and energetics. We conduct physiology based, mechanistic human and rodent studies to investigate fundamental questions such as how does the brain sense various nutrients (sugar, fat, etc), how does metabolic disease, sleep, aging impact brain function and metabolism? Using classic human metabolic techniques including hyperinsulinemic and hyper/hypoglycemic clamps coupled with advanced neuroimaging modalities including 1H and 13C magnetic resonance spectroscopy, functional MRI, and PET-CT imaging, my group has shown that glucose transport capacity into the human brain can be modified by factors such as obesity and insulin resistance as well as hyperglycemia, hypoglycemia and glycemic variability. We also have interests in using novel human imaging modalities to understand how obesity and diabetes impact neuroinflammation and neurodegeneration.