Aggregation of α-synuclein is detectable in middle-aged marmoset olfactory bulb.
Aggregated α-synuclein is mislocalized in perikarya of olfactory bulb neurons.
α-Synuclein also accumulates in hippocampus of middle-aged marmoset.
We did not observe α-synuclein accumulation in substantia nigra in this age group.