Coupling of cerebral blood flow and oxygen metabolism is conserved for chromatic and luminance stimuli in human visual cortex

► BOLD response is sensitive to blood flow/oxygen metabolism coupling. ► Variability of flow/metabolism coupling in human primary visual cortex was tested. ► Chromatic and luminance stimuli to excite cytochrome oxidase blob and interblob areas ► For stimuli tuned for similar flow response, no detected difference in BOLD response