Currently, the specific causes for PPA and other degenerative brain<unk>  similar to PPA are unknown. Autopsies have revealed a variety of brain abnormalities in people who had PPA. 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.
symptom of Alzheimer's disease
medical cause of Dementia
symptom of Lesch–Nyhan syndrome
symptom of Amyotrophic lateral sclerosis
symptom of Multiple sclerosis
symptom of Brain tumor
symptom of Myotonic dystrophy
symptom of Narcolepsy