Abstract
Purpose Many works have reported changes in the visual cortex regarding stimulation with different flickering frequencies using various neuroimaging techniques. Also, many phosphorus functional magnetic resonance spectroscopy (31P-fMRS) studies have reported high-energy phosphate (HEP) changes in the visual cortex during visual stimulation at 8 Hz, compared with rest periods. However, there have been no studies attempting to measure HEP changes during visual stimulation with different flickering frequencies. The aim of this work was to use the 31P-fMRS technique to assess possible HEP changes during visual stimulation experiments with stimuli flickering at 4 Hz or 8 Hz, and compare the results obtained with the different frequencies.
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