Integrity of callosal white matter moderates the relationship between white matter hyperintensities and executive function in older adults

White matter integrity (WMI) may contribute to brain and cognitive reserve in the face of cerebrovascular disease. We investigated WMI in the genu of the corpus callosum (GCC), an area associated with age‐related WMI and cerebrovascular health, and whether it moderates the relationship between WMH and executive functioning in older adults.