Post-Activation Brain Warming: A 1-H MRS Thermometry Study.

Temperature plays a fundamental role for the proper functioning of the brain. However, there are only fragmentary data on brain temperature (T(br)) and its regulation under different physiological conditions.We studied T(br) in the visual cortex of 20 normal subjects serially with a wide temporal window under different states including rest, activation and recovery by a visual stimulation-Magnetic Resonance Spectroscopy Thermometry combined approach. We also studied T(br) in a control region, the centrum semiovale, under the same conditions.Visual cortex mean baseline T(br) was higher than mean body temperature (37.38 vs 36.60, P