In this episode, I talk with Keith Josephs, Professor of Neurology at the Mayo Clinic in Rochester, Minnesota, about his work on the anatomy and neuropathology of progressive speech and language disorders.Josephs KA, Duffy JR, Strand EA, Whitwell JL, Layton KF, Parisi JE, et al. Clinicopathological and imaging correlates of progressive aphasia and apraxia of speech. Brain 2006; 129: 1385-98. [doi]Josephs KA, Hodges JR, Snowden JS, Mackenzie IR, Neumann M, Mann DM, et al. Neuropathological background of phenotypical variability in frontotemporal dementia. Acta Neuropathol 2011; 122: 137-53. [doi]Josephs KA, Duffy JR, Strand EA, Machulda MM, Senjem ML, Master AV, et al. Characterizing a neurodegenerative syndrome: primary progressive apraxia of speech. Brain 2012; 135: 1522-36. [doi]Josephs KA, Duffy JR, Strand EA, Machulda MM, Senjem ML, Lowe VJ, et al. Syndromes dominated by apraxia of speech show distinct characteristics from agrammatic PPA. Neurology 2013; 81: 337-45. [doi]Graff-Radford J, Jones DT, Strand EA, Rabinstein AA, Duffy JR, Josephs KA. The neuroanatomy of pure apraxia of speech in stroke. Brain Lang 2014; 129: 43-6. [doi]Josephs KA, Duffy JR, Clark HM, Utianski RL, Strand EA, Machulda MM, et al. A molecular pathology, neurobiology, biochemical, genetic and neuroimaging study of progressive apraxia of speech. Nat Commun 2021; 12: 3452. [doi]Josephs faculty webpage