Currently, the specific causes for<unk>  and other degenerative brain disease similar to<unk>  are unknown. Autopsies have revealed a variety of brain abnormalities in people who had<unk> . These autopsies, as well as imaging techniques such as CT scans, MRI, EEG, single photon emission computed tomography (SPECT), and positron emission tomography (PET), have generally revealed abnormalities to be almost exclusively in the left hemisphere.
Primary progressive aphasia
Logopenic progressive aphasia
Olive quick decline syndrome
Multiple system atrophy
Dysthanasia
Paroniria
Progressive supranuclear palsy
Semantic dementia