Medical Mastermind Community

55. In which illness do you find neurofibrillary tangles in the basal ganglia and brainstem nuclei rather than in the substantia nigra or cortex? [progressive supranuclear palsy, accept prog. bulbar palsy, Guam disease] 56. What causes "subacute combined degeneration of the cord"? [B12 deficiency] 57. ................
................