IMAGE: MRI ANALYSIS OF A PATIENT WITH PSP-LIKE SYMPTOMS SHOWED SEVERE ATROPHY OF THE BILATERAL HIPPOCAMPUS, MESENCEPHALIC TEGMENTUM, CEREBELLUM, AND BRAINSTEM. Newly discovered gene mutations may help explain the cause of a disease that drastically impairs walking and thinking. Mutations have been found in the bassoon (BSN) gene, which is involved with the central nervous system,...