MAOB and early-onset autosomal dominant Alzheimer disease: The lowest MAO-B distribution in the cerebellar cortex among the brain regions was observed in postmortem studies [18, 32], and the MAO-B distribution was not significantly different between the cerebellar cortex in the brain with neuropathological changes of Alzheimer’s disease and the brain with no or few neuropathological changes of Alzheimer’s disease [32].