A MRI study has reported that the presence of RBD is associated with a higher likelihood of DLB and less severe AD-related pathology in the medial temporal lobes, whereas absence of RBD is characterized by AD-like atrophy patterns on MRI and increased p-tau burden, indicating that RBD is specifically linked to synucleinopathy [82]. This evidence concerns the gene MAPT and Lewy body dementia.