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Joseph R. Duffy, Jr., Ph.D.

  1. Neurologic Communicative Disorder Specialist
  2. Speech-Language Pathologist
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Publications

  1. Gatto RG, Pham NTT, Duffy JR, Clark HM, Utianski RL, Botha H, Machulda MM, Lowe VJ, Schwarz CG, Jack CR Jr, Josephs KA, Whitwell JL. Multimodal cross-examination of progressive apraxia of speech by diffusion tensor imaging-based tractography and Tau-PET scans. Hum Brain Mapp. 2024 Jun 1; 45 (8):e26704
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  2. Tetzloff KA, Martin PR, Duffy JR, Utianski RL, Clark HM, Botha H, Machulda MM, Thu Pham NT, Schwarz CG, Senjem ML, Jack CR Jr, Lowe VJ, Josephs KA, Whitwell JL. Longitudinal flortaucipir, metabolism and volume differ between phonetic and prosodic speech apraxia. Brain. 2024 May 3; 147 (5):1696-1709
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  3. Garcia-Guaqueta DP, Botha H, Utianski RL, Duffy JR, Clark HM, Goodrich AW, Pham NTT, Machulda MM, Baker M, Rademakers R, Whitwell JL, Josephs KA. Progression to corticobasal syndrome: a longitudinal study of patients with nonfluent primary progressive aphasia and primary progressive apraxia of speech. J Neurol. 2024 Apr 7 Epub 2024 Apr 07
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  4. Meade G, Whitwell JL, Dickson DW, Duffy JR, Clark HM, Ahlskog JE, Machulda MM, Josephs KA, Utianski RL. Primary Progressive Apraxia of Speech Caused by TDP-43: A Case Report. Neurol Genet. 2024 Apr; 10 (2):e200134 Epub 2024 Mar 19
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  5. Shir D, Corriveau-Lecavalier N, Bermudez Noguera C, Barnard L, Pham NTT, Botha H, Duffy JR, Clark HM, Utianski RL, Knopman DS, Petersen RC, Boeve BF, Murray ME, Nguyen AT, Reichard RR, Dickson DW, Day GS, Kremers WK, Graff-Radford NR, Jones DT, Machulda MM, Fields JA, Whitwell JL, Josephs KA, Graff-Radford J. Clinicoradiological and neuropathological evaluation of primary progressive aphasia. J Neurol Neurosurg Psychiatry. 2024 Mar 21 [Epub ahead of print]
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  6. Wiepert DA, Malin B, Duffy JR, Utianski RL, Stricker JL, Jones DT, Botha H. Reidentification of Participants in Shared Clinical Data Sets: Experimental Study JMIR AI. 2024.
  7. Tetzloff KA, Duffy JR, Clark HM, Josephs KA, Whitwell JL, Utianski RL. Characterizing Speech Errors Across Primary Progressive Apraxia of Speech Subtypes. J Speech Lang Hear Res. 2024 Mar 11; 67 (3):811-820 Epub 2024 Feb 20
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  8. Vaara ST, Serpa Neto A, Bellomo R, Adhikari NKJ, Dreyfuss D, Gallagher M, Gaudry S, Hoste E, Joannidis M, Pettila V, Wang AY, Kashani K, Wald R, Bagshaw SM, Ostermann M, STandard vs. Accelerated initiation of Renal Replacement Therapy in Acute Kidney Injury (STARRT-AKI) Investigators, Campbell V, Hill D, Jin X, Ji X, Liu P, Liu M, Wu J, Fu Y, Qin B, Li M, Yu Z, Zhang J, Wang Q, Hu X, Qin S, Zhou Q, Liu H, Guo L, Liu Y, Zhao D, Li J, Pan C, Bailey M, Young P, Duffy J, Smith J, Lee S, Peters C, Henderson S, Howe E, Kashani KB, Albright RC Jr, Amsbaugh A, Niven AS, Kiley S, White P. Regional Practice Variation and Outcomes in the Standard Versus Accelerated Initiation of Renal Replacement Therapy in Acute Kidney Injury (STARRT-AKI) Trial: A Post Hoc Secondary Analysis. Crit Care Explor. 2024 Feb; 6 (2):e1053 Epub 2024 Feb 19
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  9. Gatto RG, Martin PR, Utianski RL, Duffy JR, Clark HM, Botha H, Machulda MM, Josephs KA, Whitwell JL. Diffusion tensor imaging-based multi-fiber tracking reconstructions can regionally differentiate phonetic versus prosodic subtypes of progressive apraxia of speech. Cortex. 2024 Feb; 171:272-286 Epub 2023 Nov 08
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  10. Orlandi F, Carlos AF, Ali F, Clark HM, Duffy JR, Utianski RL, Botha H, Machulda MM, Stephens YC, Schwarz CG, Senjem ML, Jack CR, Agosta F, Filippi M, Dickson DW, Josephs KA, Whitwell JL. Histologic tau lesions and magnetic resonance imaging biomarkers differ across two progressive supranuclear palsy variants. Brain Commun. 2024; 6 (2):fcae113 Epub 2024 Apr 05
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  11. Carlos AF, Weigand SD, Duffy JR, Clark HM, Utianski RL, Machulda MM, Botha H, Thu Pham NT, Lowe VJ, Schwarz CG, Whitwell JL, Josephs KA. Volumetric analysis of hippocampal subregions and subfields in left and right semantic dementia. Brain Commun. 2024; 6 (2):fcae097 Epub 2024 Mar 25
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  12. Gatto RG, Meade G, Duffy JR, Clark HM, Utianski RL, Botha H, Machulda MM, Josephs KA, Whitwell JL. Combined assessment of progressive apraxia of speech brain microstructure by diffusion tensor imaging tractography and multishell neurite orientation dispersion and density imaging. Brain Behav. 2024 Jan; 14 (1):e3346
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  13. Wauters LD, Croot K, Dial HR, Duffy JR, Grasso SM, Kim E, Schaffer Mendez K, Ballard KJ, Clark HM, Kohley L, Murray LL, Rogalski EJ, Figeys M, Milman L, Henry ML. Behavioral Treatment for Speech and Language in Primary Progressive Aphasia and Primary Progressive Apraxia of Speech: A Systematic Review. Neuropsychol Rev. 2023 Oct 4 Epub 2023 Oct 04
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  14. Utianski RL, Meade G, Duffy JR, Clark HM, Botha H, Machulda MM, Dickson DW, Whitwell JL, Josephs KA. Longitudinal characterization of patients with progressive apraxia of speech without clearly predominant phonetic or prosodic speech features. Brain Lang. 2023 Oct; 245:105314 Epub 2023 Aug 20
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  15. Utianski RL, Martin PR, Duffy JR, Clark HM, Stierwalt JAG, Botha H, Ali F, Whitwell JL, Josephs KA. Assessing Patients and Care Partner Ratings of Communication-Related Participation Restrictions: Insights From Degenerative Disease. Am J Speech Lang Pathol. 2023 Aug 17; 32 (4S):1793-1805 Epub 2023 Feb 09
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  16. Utianski RL, Duffy JR, Martin PR, Clark HM, Stierwalt JAG, Botha H, Ali F, Whitwell JL, Josephs KA. Rate Modulation Abilities in Acquired Motor Speech Disorders. J Speech Lang Hear Res. 2023 Aug 17; 66 (8S):3194-3205 Epub 2023 Feb 13
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  17. Josephs KA, Duffy JR, Martin PR, Stephens YC, Singh NA, Clark HM, Botha H, Lowe VJ, Whitwell JL, Utianski RL. Acoustic Analysis and Neuroimaging Correlates of Diadochokinetic Rates in Mild-Moderate Primary Progressive Apraxia of Speech. Brain Lang. 2023 May; 240 Epub 2023 Apr 06
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  18. Robinson CG, Duffy JR, Clark HA, Utianski RL, Machulda MM, Botha H, Singh NA, Pham NTT, Ertekin-Taner N, Dickson DW, Lowe VJ, Whitwell JL, Josephs KA. Clinicopathological associations of hemispheric dominance in primary progressive apraxia of speech. Eur J Neurol. 2023 May; 30 (5):1209-1219 Epub 2023 Mar 15
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  19. Duffy JR, Martin PR, Clark HM, Utianski RL, Strand EA, Whitwell JL, Josephs KA. The Apraxia of Speech Rating Scale: Reliability, Validity, and Utility. Am J Speech Lang Pathol. 2023 Mar 9; 32 (2):469-491 Epub 2023 Jan 11
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  20. Buciuc M, Koga S, Pham NTT, Duffy JR, Knopman DS, Ali F, Boeve BF, Graff-Radford J, Botha H, Lowe VJ, Nguyen A, Reichard RR, Dickson DW, Petersen RC, Whitwell JL, Josephs KA. The many faces of globular glial tauopathy: A clinical and imaging study. Eur J Neurol. 2023 Feb; 30(2):321-333. Epub 2022 Nov 01.
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  21. Singh NA, Martin PR, Graff-Radford J, Sintini I, Machulda MM, Duffy JR, Gunter JL, Botha H, Jones DT, Lowe VJ, Jack CR Jr, Josephs KA, Whitwell JL. Altered within- and between-network functional connectivity in atypical Alzheimer's disease. Brain Commun. 2023; 5 (4):fcad184 Epub 2023 June 14
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  22. Satoh R, Arani A, Senjem ML, Duffy JR, Clark HM, Utianski RL, Botha H, Machulda MM, Jack CR Jr, Whitwell JL, Josephs KA. Spatial patterns of elevated magnetic susceptibility in progressive apraxia of speech. Neuroimage Clin. 2023; 38:103394 Epub 2023 Mar 28
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  23. Utianski RL, Trang Thu Pham N, Botha H, Ali F, Duffy JR, Clark HM, Lowe VJ, Whitwell JL, Josephs KA. Longitudinal changes in dopamine transporter uptake scans in progressive apraxia of speech. Clin Park Relat Disord. 2023; 9:100207 Epub 2023 June 16
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  24. Tetzloff KA, Duffy JR, Clark HM, Pham NTT, Machulda MM, Botha H, Jack CR, Dickson DW, Lowe VJ, Josephs KA, Whitwell JL, Utianski RL. Amyloid and Tau PET Positivity in Progressive Agrammatic Aphasia and Apraxia of Speech. J Alzheimers Dis. 2023; 96 (4):1759-1765
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  25. Utianski RL, Clark HM, Martin PR, Stierwalt JAG, Duffy JR, Botha H, Ali F, Josephs KA. Patient and Care Partner Ratings of Communication Participation in Frontotemporal Dementia. Alzheimers Dement. 2022 Dec; 18 Suppl 9:e060715
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  26. Sintini I, Duffy JR, Clark HM, Utianski RL, Botha H, Machulda MM, Senjem ML, Strand EA, Schwarz CG, Lowe VJ, Jack CR, Josephs KA, Whitwell JL. Functional connectivity to the premotor cortex maps onto longitudinal brain neurodegeneration in progressive apraxia of speech. Neurobiol Aging. 2022 Dec; 120:105-116 Epub 2022 Sept 02
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  27. Soumerai JD, Rosenthal A, Harkins S, Duffy J, Mecca C, Wang Y, Grewal RK, El-Jawahri AR, Liu H, Menard C, Dogan A, Yang L, Rimsza LM, Bantilan K, Martin H, Lei M, Mohr S, Kurilovich A, Kudryashova O, Postovalova E, Nardi V, Abramson JS, Chiarle R, Zelenetz AD, Louissaint A Jr. Next-generation ALK inhibitors are highly active in ALK-positive large B-cell lymphoma. Blood. 2022 Oct 20; 140 (16):1822-1826
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  28. Chandregowda A, Duffy JR, Machulda MM, Lowe VJ, Whitwell JL, Josephs KA. Dynamic aphasia with emerging agrammatism, anomia, and aberrant frontal behaviors in a case of atypical parkinsonism. Neurol Clin Neurosci. 2022 Sep; 10 (5):262-265 Epub 2022 July 20
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  29. Utianski RL, Duffy JR. Understanding, Recognizing, and Managing Functional Speech Disorders: Current Thinking Illustrated With a Case Series. Am J Speech Lang Pathol. 2022 May 10; 31(3):1205-1220. Epub 2022 Mar 15.
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  30. Polsinelli AJ, Machulda MM, Martin PR, Duffy JR, Clark HM, Butts AM, Botha H, Lowe VJ, Whitwell JL, Josephs KA, Utianski RL. Neuropsychological Profiles of Patients with Progressive Apraxia of Speech and Aphasia. J Int Neuropsychol Soc. 2022 May; 28 (5):441-451 Epub 2021 July 22
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  31. Simpson HD, Duffy JR, Stierwalt JAG, Ahlskog JE, Hassan A. Speech-induced action myoclonus. Parkinsonism Relat Disord. 2022 May; 98:41-46 Epub 2022 Apr 14
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  32. Grijalva RM, Pham NTT, Huang Q, Martin PR, Ali F, Clark HM, Duffy JR, Utianski RL, Botha H, Machulda MM, Weigand SD, Ahlskog JE, Dickson DW, Josephs KA, Whitwell JL. Brainstem Biomarkers of Clinical Variant and Pathology in Progressive Supranuclear Palsy. Mov Disord. 2022 Apr; 37 (4):702-712 Epub 2021 Dec 31
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  33. Utianski RL, Botha H, Caviness JN, Worrell GA, Duffy JR, Clark HM, Whitwell JL, Josephs KA. A Preliminary Report of Network Electroencephalographic Measures in Primary Progressive Apraxia of Speech and Aphasia. Brain Sci. 2022 Mar 12; 12 (3)
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  34. Clark HM, Duffy JR, Strand EA, Hanley H, Solomon NP. Orofacial Muscle Strength across the Dysarthrias. Brain Sci. 2022 Mar 10; 12(3).
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  35. Gatto RG, Martin PR, Ali F, Clark HM, Duffy JR, Utianski RL, Botha H, Machulda MM, Dickson DW, Josephs KA, Whitwell JL. Diffusion tractography of superior cerebellar peduncle and dentatorubrothalamic tracts in two autopsy confirmed progressive supranuclear palsy variants: Richardson syndrome and the speech-language variant. Neuroimage Clin. 2022; 35:103030 Epub 2022 May 11
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  36. Valls Carbo A, Reid RI, Tosakulwong N, Weigand SD, Duffy JR, Clark HM, Utianski RL, Botha H, Machulda MM, Strand EA, Schwarz CG, Jack CR, Josephs KA, Whitwell JL. Tractography of supplementary motor area projections in progressive speech apraxia and aphasia. Neuroimage Clin. 2022; 34:102999 Epub 2022 Mar 30
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  37. Hokelekli FO, Duffy JR, Clark HM, Utianski RL, Botha H, Stierwalt JA, Strand EA, Machulda MM, Whitwell JL, Josephs KA. Cross-Sectional and Longitudinal Assessment of Behavior in Primary Progressive Apraxia of Speech and Agrammatic Aphasia. Dement Geriatr Cogn Disord. 2022; 51 (2):193-202 Epub 2022 May 06
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  38. Hokelekli FO, Duffy JR, Clark HM, Utianski RL, Botha H, Ali F, Stierwalt JA, Machulda MM, Reichard RR, Dickson DW, Whitwell JL, Josephs KA. Autopsy Validation of Progressive Supranuclear Palsy-Predominant Speech/Language Disorder Criteria. Mov Disord. 2022 Jan; 37 (1):213-218 Epub 2021 Oct 10
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  39. Butts AM, Machulda MM, Martin P, Przybelski SA, Duffy JR, Graff-Radford J, Knopman DS, Petersen RC, Jack CR Jr, Lowe VJ, Josephs KA, Whitwell JL. Temporal Cortical Thickness and Cognitive Associations among Typical and Atypical Phenotypes of Alzheimer's Disease. J Alzheimers Dis Rep. 2022; 6 (1):479-491 Epub 2022 Aug 05
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  40. Chandregowda A, Clark HM, Duffy JR, Machulda MM, Lowe VJ, Whitwell JL, Josephs KA. Dynamic Aphasia as a Variant of Frontotemporal Dementia. Cogn Behav Neurol. 2021 Dec 2; 34 (4):303-318 Epub 2021 Dec 02
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  41. Dang J, Graff-Radford J, Duffy JR, Utianski RL, Clark HM, Stierwalt JA, Whitwell JL, Josephs KA, Botha H. Progressive apraxia of speech: delays to diagnosis and rates of alternative diagnoses. J Neurol. 2021 Dec; 268 (12):4752-4758 Epub 2021 May 04
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  42. Whitwell JL, Tosakulwong N, Weigand SD, Graff-Radford J, Ertekin-Taner N, Machulda MM, Duffy JR, Schwarz CG, Senjem ML, Jack CR, Lowe VJ, Josephs KA, Alzheimer's Disease Neuroimaging Initiative. Relationship of APOE, age at onset, amyloid and clinical phenotype in Alzheimer disease. Neurobiol Aging. 2021 Dec; 108:90-98 Epub 2021 Aug 25
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  43. Utianski RL, Martin PR, Duffy JR, Botha H, Clark HM, Josephs KA. Assessing Change in Communication Limitations in Primary Progressive Apraxia of Speech and Aphasia: A 1-Year Follow-Up Study. Am J Speech Lang Pathol. 2021 Nov 4; 30 (6):2368-2378 Epub 2021 Sept 07
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  44. Scheffel L, Duffy JR, Strand EA, Josephs KA. Word Fluency Test Performance in Primary Progressive Aphasia and Primary Progressive Apraxia of Speech. Am J Speech Lang Pathol. 2021 Nov 4; 30 (6):2635-2642 Epub 2021 Oct 21
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  45. Hokelekli FO, Ali F, Carlos AF, Martin PR, Clark HM, Duffy JR, Utianski RL, Botha H, St Louis EK, Whitwell JL, Josephs KA. Sleep disturbances in the speech-language variant of progressive supranuclear palsy. Parkinsonism Relat Disord. 2021 Oct; 91:9-12 Epub 2021 Aug 18
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  46. Baker J, Barnett C, Cavalli L, Dietrich M, Dixon L, Duffy JR, Elias A, Fraser DE, Freeburn JL, Gregory C, McKenzie K, Miller N, Patterson J, Roth C, Roy N, Short J, Utianski R, van Mersbergen M, Vertigan A, Carson A, Stone J, McWhirter L. Management of functional communication, swallowing, cough and related disorders: consensus recommendations for speech and language therapy. J Neurol Neurosurg Psychiatry. 2021 Oct; 92 (10):1112-1125 Epub 2021 July 01
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  47. Van Stan JH, Whyte J, Duffy JR, Barkmeier-Kraemer J, Doyle P, Gherson S, Kelchner L, Muise J, Petty B, Roy N, Stemple J, Thibeault S, Tolejano CJ. Voice Therapy According to the Rehabilitation Treatment Specification System: Expert Consensus Ingredients and Targets. Am J Speech Lang Pathol. 2021 Sep 23; 30 (5):2169-2201 Epub 2021 Aug 31
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  48. Buciuc M, Duffy JR, Machulda MM, Graff-Radford J, Pham NTT, Martin PR, Senjem ML, Jack CR Jr, Ertekin-Taner N, Dickson DW, Lowe VJ, Whitwell JL, Josephs KA. Clinical, Imaging, and Pathologic Characteristics of Patients With Right vs Left Hemisphere-Predominant Logopenic Progressive Aphasia. Neurology. 2021 Aug 3; 97 (5):e523-e534 Epub 2021 June 04
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  49. Chandregowda A, Duffy JR, Machulda MM, Lowe VJ, Whitwell JL, Josephs KA. Neurodegeneration of the visual word form area in a patient with word form alexia. Neurol Clin Neurosci. 2021 Jul; 9 (4):359-360 Epub 2021 May 24
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  50. Josephs KA, Duffy JR, Clark HM, Utianski RL, Strand EA, Machulda MM, Botha H, Martin PR, Pham NTT, Stierwalt J, Ali F, Buciuc M, Baker M, Fernandez De Castro CH, Spychalla AJ, Schwarz CG, Reid RI, Senjem ML, Jack CR Jr, Lowe VJ, Bigio EH, Reichard RR, Polley EJ, Ertekin-Taner N, Rademakers R, DeTure MA, Ross OA, Dickson DW, Whitwell JL. A molecular pathology, neurobiology, biochemical, genetic and neuroimaging study of progressive apraxia of speech. Nat Commun. 2021 Jun 8; 12 (1):3452 Epub 2021 June 08
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  51. Whitwell JL, Martin P, Duffy JR, Clark HM, Utianski RL, Botha H, Machulda MM, Strand EA, Josephs KA. Survival Analysis in Primary Progressive Apraxia of Speech and Agrammatic Aphasia. Neurol Clin Pract. 2021 Jun; 11 (3):249-255
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  52. Petroi D, Walker GM, Duffy JR, Hickok GS, Josephs KA. A Cognitive Psychometric Investigation of Word Production and Phonological Error Rates in Logopenic Progressive Aphasia. Am J Speech Lang Pathol. 2021 May 18; 30 (3):1194-1202 Epub 2021 Apr 19
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  53. Van Stan JH, Whyte J, Duffy JR, Barkmeier-Kraemer JM, Doyle PB, Gherson S, Kelchner L, Muise J, Petty B, Roy N, Stemple J, Thibeault S, Tolejano CJ. Rehabilitation Treatment Specification System: Methodology to Identify and Describe Unique Targets and Ingredients. Arch Phys Med Rehabil. 2021 Mar; 102 (3):521-531 Epub 2020 Oct 13
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  54. Buciuc M, Whitwell JL, Kasanuki K, Graff-Radford J, Machulda MM, Duffy JR, Strand EA, Lowe VJ, Graff-Radford NR, Rush BK, Franczak MB, Flanagan ME, Baker MC, Rademakers R, Ross OA, Ghetti BF, Parisi JE, Raghunathan A, Reichard RR, Bigio EH, Dickson DW, Josephs KA. Lewy Body Disease is a Contributor to Logopenic Progressive Aphasia Phenotype. Ann Neurol. 2021 Mar; 89 (3):520-533 Epub 2020 Dec 17
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  55. Utianski RL, Martin PR, Hanley H, Duffy JR, Botha H, Clark HM, Whitwell JL, Josephs KA. A Longitudinal Evaluation of Speech Rate in Primary Progressive Apraxia of Speech. J Speech Lang Hear Res. 2021 Feb 17; 64 (2):392-404 Epub 2021 Jan 21
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  56. Buciuc M, Duffy JR, Machulda MM, Spychalla AJ, Gunter JL, Jack CR Jr, Giannini C, Raghunathan A, Dickson DW, Josephs KA, Whitwell JL. Association of amyloid angiopathy with microbleeds in logopenic progressive aphasia: an imaging-pathology study. Eur J Neurol. 2021 Feb; 28 (2):670-675 Epub 2020 Nov 12
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  57. Tetzloff KA, Duffy JR, Strand EA, Machulda MM, Schwarz CG, Senjem ML, Jack CR, Josephs KA, Whitwell JL. Phonological Errors in Posterior Cortical Atrophy. Dement Geriatr Cogn Disord. 2021; 50 (2):195-203 Epub 2021 July 16
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  58. Duffy JR, Utianski RL, Josephs KA. Primary Progressive Apraxia of Speech: From Recognition to Diagnosis and Care. Aphasiology. 2021; 35 (4):560-591 Epub 2020 July 07
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  59. Curet Burleson AX, Pham NTT, Buciuc M, Botha H, Duffy JR, Clark HM, Utianski RL, Machulda MM, Baker MC, Rademakers R, Lowe VJ, Whitwell JL, Josephs KA. Neurobehavioral Characteristics of FDG-PET Defined Right-Dominant Semantic Dementia: A Longitudinal Study. Dement Geriatr Cogn Disord. 2021; 50 (1):17-28 Epub 2021 Mar 23
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  60. Whitwell JL, Tosakulwong N, Schwarz CC, Senjem ML, Spychalla AJ, Duffy JR, Graff-Radford J, Machulda MM, Boeve BF, Knopman DS, Petersen RC, Lowe VJ, Jack CR Jr, Dickson DW, Parisi JE, Josephs KA. Longitudinal anatomic, functional, and molecular characterization of Pick disease phenotypes. Neurology. 2020 Dec 15; 95(24):e3190-e3202. Epub 2020 Sep 28.
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  61. Seckin ZI, Duffy JR, Strand EA, Clark HM, Utianski RL, Machulda MM, Botha H, Ali F, Thu Pham NT, Lowe VJ, Whitwell JL, Josephs KA. The evolution of parkinsonism in primary progressive apraxia of speech: A 6-year longitudinal study. Parkinsonism Relat Disord. 2020 Dec; 81:34-40. Epub 2020 Oct 07.
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  62. Utianski RL, Clark HM, Duffy JR, Botha H, Whitwell JL, Josephs KA. Communication Limitations in Patients With Progressive Apraxia of Speech and Aphasia. Am J Speech Lang Pathol. 2020 Nov 12; 29 (4):1976-1986 Epub 2020 Aug 05
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  63. Ghirelli A, Tosakulwong N, Weigand SD, Clark HM, Ali F, Botha H, Duffy JR, Utianski RL, Buciuc M, Murray ME, Labuzan SA, Spychalla AJ, Pham NTT, Schwarz CG, Senjem ML, Machulda MM, Baker M, Rademakers R, Filippi M, Jack CR Jr, Lowe VJ, Parisi JE, Dickson DW, Josephs KA, Whitwell JL. Sensitivity-Specificity of Tau and Amyloid beta Positron Emission Tomography in Frontotemporal Lobar Degeneration. Ann Neurol. 2020 Nov; 88 (5):1009-1022 Epub 2020 Sept 12
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  64. Boes S, Botha H, Machulda M, Lowe V, Graff-Radford J, Whitwell JL, Utianski RL, Duffy JR, Josephs KA. Dementia with Lewy bodies presenting as Logopenic variant primary progressive Aphasia. Neurocase. 2020 Oct; 26 (5):259-263 Epub 2020 July 16
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  65. Seckin ZI, Whitwell JL, Utianski RL, Botha H, Ali F, Duffy JR, Clark HM, Machulda MM, Jordan LG, Min HK, Lowe VJ, Josephs KA. Ioflupane 123I (DAT scan) SPECT identifies dopamine receptor dysfunction early in the disease course in progressive apraxia of speech. J Neurol. 2020 Sep; 267(9):2603-2611. Epub 2020 May 09.
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  66. Choudhury P, Scharf EL, Paolini MA 2nd, Graff-Radford J, Alden EC, Machulda MM, Jones DT, Fields JA, Murray ME, Graff-Radford NR, Constantopoulos E, Reichard RR, Knopman DS, Duffy JR, Dickson DW, Parisi JE, Josephs KA, Petersen RC, Boeve BF. Pick's disease: clinicopathologic characterization of 21 cases. J Neurol. 2020 Sep; 267 (9):2697-2704 Epub 2020 May 21
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  67. Utianski RL, Botha H, Whitwell JL, Martin PR, Schwarz CG, Duffy JR, Clark HM, Spychalla AJ, Senjem ML, Petersen RC, Knopman DS, Jack CR Jr, Lowe VJ, Josephs KA. Longitudinal flortaucipir ([(18)F]AV-1451) PET uptake in semantic dementia. Neurobiol Aging. 2020 Aug; 92:135-140 Epub 2020 Apr 18
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  68. Tisel SM, Ahlskog JE, Duffy JR, Matsumoto JY, Josephs KA. PSP-like syndrome after aortic surgery in adults (Mokri syndrome). Neurol Clin Pract. 2020 Jun; 10 (3):245-254
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  69. Utianski RL, Duffy JR, Clark HM, Strand EA, Botha H, Schwarz CG, Machulda MM, Senjem ML, Spychalla AJ, Jack CR Jr, Petersen RC, Lowe VJ, Whitwell JL, Josephs KA. Corrigendum to "Prosodic and phonetic subtypes of primary progressive apraxia of speech" [Brain Lang. 184 (2018) 54-65]. Brain Lang. 2020 Jun; 205:104792 Epub 2020 Apr 02
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  70. Petroi D, Duffy JR, Borgert A, Strand EA, Machulda MM, Senjem ML, Jack CR Jr, Josephs KA, Whitwell JL. Neuroanatomical correlates of phonologic errors in logopenic progressive aphasia. Brain Lang. 2020 May; 204:104773 Epub 2020 Feb 27
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  71. Utianski RL, Martin PR, Botha H, Schwarz CG, Duffy JR, Petersen RC, Knopman DS, Clark HM, Butts AM, Machulda MM, Jack CR Jr, Lowe VJ, Whitwell JL, Josephs KA. Longitudinal flortaucipir ([(18)F]AV-1451) PET imaging in primary progressive apraxia of speech. Cortex. 2020 Mar; 124:33-43 Epub 2019 Nov 19
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  72. Clark HM, Utianski RL, Duffy JR, Strand EA, Botha H, Josephs KA, Whitwell JL. Western Aphasia Battery-Revised Profiles in Primary Progressive Aphasia and Primary Progressive Apraxia of Speech. Am J Speech Lang Pathol. 2020 Feb 21; 29 (1S):498-510 Epub 2019 Oct 22
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  73. Whitwell JL, Tosakulwong N, Weigand SD, Graff-Radford J, Duffy JR, Clark HM, Machulda MM, Botha H, Utianski RL, Schwarz CG, Senjem ML, Strand EA, Ertekin-Taner N, Jack CR, Lowe VJ, Josephs KA. Longitudinal Amyloid-beta PET in Atypical Alzheimer's Disease and Frontotemporal Lobar Degeneration. J Alzheimers Dis. 2020; 74 (1):377-389
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  74. Whitwell JL, Tosakulwong N, Botha H, Ali F, Clark HM, Duffy JR, Utianski RL, Stevens CA, Weigand SD, Schwarz CG, Senjem ML, Jack CR, Lowe VJ, Ahlskog JE, Dickson DW, Josephs KA. Brain volume and flortaucipir analysis of progressive supranuclear palsy clinical variants. Neuroimage Clin. 2020; 25:102152 Epub 2019 Dec 28
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  75. Gabere M, Thu Pham NT, Graff-Radford J, Machulda MM, Duffy JR, Josephs KA, Whitwell JL, for Alzheimer's Disease Neuroimaging Initiative. Automated Hippocampal Subfield Volumetric Analyses in Atypical Alzheimer's Disease. J Alzheimers Dis. 2020; 78 (3):927-937
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  76. Utianski RL, Botha H, Martin PR, Schwarz CG, Duffy JR, Clark HM, Machulda MM, Butts AM, Lowe VJ, Jack CR Jr, Senjem ML, Spychalla AJ, Whitwell JL, Josephs KA. Clinical and neuroimaging characteristics of clinically unclassifiable primary progressive aphasia. Brain Lang. 2019 Oct; 197:104676 Epub 2019 Aug 13
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  77. Utianski RL, Duffy JR, Clark HM, Machulda MM, Dickson DW, Whitwell JL, Josephs KA. Prominent auditory deficits in primary progressive aphasia: A case study. Cortex. 2019 Aug; 117:396-406 Epub 2019 Feb 21
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  178. Paslawski T, Duffy JR, Vernino S. Speech and language findings associated with paraneoplastic cerebellar degeneration. Am J Speech Lang Pathol. 2005 Aug; 14(3):200-7.
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  181. Wang YT, Kent RD, Duffy JR, Thomas JE. Dysarthria associated with traumatic brain injury: Speaking rate and emphatic stress. J Commun Disord. 2005 May-Jun; 38(3):231-60.
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  183. Rosen KM, Kent RD, Duffy JR. Task-based profile of vocal intensity decline in Parkinson's disease. Folia Phoniatrica et Logopaedica. 2005 Jan-Feb; 57(1):28-37.
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  185. Duffy JR, Yorkston KM. ANCDS bulletin board. Medical interventions for spasmodic dysphonia and some related conditions: a systematic review. J Med Speech Lang Pathol. 2003 Dec; 11(4):ix-lviii.
  186. Rosen KM, Kent RD, Duffy JR. Lognormal distribution of pause length in ataxic dysarthria. Clin Linguist Phon. 2003 Sep; 17(6):469-86.
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  187. Blake ML, Duffy JR, Boeve BF, Ahlskog JE, Maraganore DM. Speech and language disorders associated with corticobasal degeneration. J Med Speech Lang Pathol. 2003 Sep; 11(3):131-46.
  188. Kent RD, Vorperian HK, Kent JF, Duffy JR. Voice dysfunction in dysarthria: application of the Multi-Dimensional Voice Program. J Commun Disord. 2003 Jul-Aug; 36(4):281-306.
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  189. Yorkston KM, Spencer KA, Duffy JR. Behavioral management of respiratory/phonatory dysfunction from dysarthria: a systematic review of the evidence. J Med Speech Lang Pathol. 2003 Jun; 11(2):13-38.
  190. Spencer KA, Yorkston KM, Duffy JR. Behavioral management of respiratory/phonatory dysfunction from dysarthria: a flowchart for guidance in clinical decision making. J Med Speech Lang Pathol. 2003 Jun; 11(2):39-61.
  191. Blake ML, Duffy JR, Tompkins CA, Myers PS. Right hemisphere syndrome is in the eye of the beholder. Aphasiology. 2003 May; 17(5):423-32.
  192. Frattali C, Duffy JR, Litvan I, Patsalides AD, Grafman J. Yes/no reversals as neurobehavioral sequela: a disorder of language, praxis, or inhibitory control? Eur J Neurol. 2003 Jan; 10(1):103-6.
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  193. Boeve B, Dickson D, Duffy J, Bartleson J, Trenerry M, Petersen R. Progressive nonfluent aphasia and subsequent aphasic dementia associated with atypical progressive supranuclear palsy pathology. Eur Neurol. 2003; 49 (2):72-8
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  194. Duffy JR, Yorkston KM. Medical Interventions for Spasmodic Dysphonia and Some Related Conditions: A Systematic. (Review) Journal of Medical Speech-Language Pathology. 2003; 11:ix-lviii.
  195. Duffy JR, Kent RD, Kent JF. The contribution of motor speech disorders to understanding speech motor control. D. Recasesn et al. (eds), Proceeding of the 15th International Congress of Phonetic Sciences (Barcelona, August 3-9). 2003;
  196. Blake ML, Duffy JR, Myers PS, Tompkins CA. Prevalence and patterns of right hemisphere cognitive/communicative deficits: Retrospective data from an inpatient rehabilitation unit. Aphasiology. 2002 Apr-Jun; 16(4-6):537-47.
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  197. Meyer FB, Bates LM, Goerss SJ, Friedman JA, Windschitl WL, Duffy JR, Perkins WJ, O'Neill BP. Awake craniotomy for aggressive resection of primary gliomas located in eloquent brain. Mayo Clin Proc. 2001 Jul; 76(7):677-87.
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  198. Duffy JR, Kent RD. Darley's contributions to the understanding, differential diagnosis, and scientific study of the dysarthrias. Aphasiology. 2001 Mar; 15(3):275-289.
  199. Yorkston KM, Spencer KA, Duffy JR, Beukelman DR, Golper LA, Miller RM, Strand EA, Sullivan M. Evidence-Based Practice Guidelines for Dysarthria: Management of Velopharyngeal Function. Journal of Medical Speech-Language Pathology. 2001; 9(4):257-73.
  200. Bunton K, Kent RD, Kent JF, Duffy JR. The effects of flattening fundamental frequency contours on sentence intelligibility in a speaker with dysarthria. Clinical Linguistics and Phonetics. 2001; 15:181-94.
  201. Kent RD, Duffy JR, Slama A, Kent JF, Clift A. Clinicoanatomic studies in dysarthria: review, critique, and directions for research. Journal of Speech Language, and Hearing Research. 2001; 44:535-51.
  202. Uitti RJ, Wharen RE, Duffy JR, Lucas JA, Schneider SL, Rippeth JD, Wszolek ZK, Obwegeser AA, Turk MF, Atkinson EJ. Unilateral pallidotomy for Parkinson's disease: speech, motor, and neuropsychological outcome measurements. Parkinsonism Relat Disord. 2000 Jul 1; 6 (3):133-143
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  203. Kent RD, Kent JF, Duffy JR, Weismer G, Stuntebeck S. Ataxic dysarthria. Journal of Speech-Language-Hearing Research. 2000;43:1275-89.
  204. Kent RD, Kent JF, Weismer G, Duffy JR. What dysarthrias can tell us about the neural control of speech. Journal of Phonetics. 2000; 28:273-302.
  205. Schneider SL, Wijdicks EFM, Duffy JR, O'Brien TJ. Wernicke's aphasia after putaminal hemorrhage: unusual clinical and SPECT findings. Aphasiology. 1999 Sep-Nov; 13(9-11):755-765.
  206. Kent RD, Vorperian HK, Duffy JR. Reliability of the Multidimensional Voice Program for the analysis of voice samples of subjects with dysarthria. American Journal of Speech-Language Pathology. 1999; 8:129-36.
  207. Kent RD, Duffy JR, Kent JF, Vorperian HK, Thomas JE. Quantification of motor speech abilities in stroke: Time-energy analysis of syllable and word repetition. Journal of Medical Speech-Language Pathology. 1999; 7:83-90.
  208. Kent RD, Weismer G, Kent JF, Vorperian HK, Duffy JR. Acoustic studies of dysarthric speech: Methods, progress, and potential. Journal of Communication Disorders. 1999; 32:141-86.
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  209. Duffy JR. Stroke with dysarthria: evaluate and treat; garden variety or down the garden path? Seminars in Speech & Language. 1998; 19(1):93-8; quiz 99.
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  210. Kent RD, Kent JF, Duffy JR, Weismer G. The dysarthrias: Speech-voice profiles, related dysfunctions, and neuropathology. Journal of Medical Speech-Language Pathology. 1998; 6(4):165-211.
  211. Kent RD, Duffy JR, Vorperian HK, Thomas JE. Severe essential vocal and oromandibular tremor: A case report. Phonoscope. 1998; 1(4):237-53.
  212. Duffy JR, Werven GW, Aronson AE. Telemedicine and the diagnosis of speech and language disorders. Mayo Clin Proc. 1997 Dec; 72 (12):1116-22
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  213. Boutsen FR, Bakker K, Duffy JR. Subgroups in ataxic dysarthria. Journal of Medical Speech-Language Pathology. 1997; 5:27-36.
  214. Baumgartner J, Duffy JR. Psychogenic stuttering in adults with and without neurologic disease. Journal of Medical Speech-Language Pathology. 1997; 5:75-95.
  215. Duffy JR, Folger WN. Dysarthria associated with unilateral central nervous system lesions: a retrospective study. J Med Speech Lang Pathol. 1996 Jun; 4(2):57-70.
  216. Duffy JR. Why differential diagnosis? Special Interest Division 2 Newsletter. 1995; 5:2-6.
  217. Lutsep HL, Duffy JR, Cascino GD. Frequency, risk factors, and characterization of aphasia following left temporal lobectomy. Journal of Medical Speech-Language Pathology. 1995; 3:191-8.
  218. Duffy RJ, Watt JH, Duffy JR. Testing causal theories of pantominic deficits in aphasia using path analysis. Aphasiology. 1994 Jul-Aug; 8:361-379.
  219. Philbrick KL, Rummans TA, Duffy JR, Kokmen E, Jack CR Jr. Primary progressive aphasia. An uncommon masquerader of psychiatric disorders. Psychosomatics. 1994 Mar-Apr; 35: (2)138-41.
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  220. Duffy RJ, Watt JH, Duffy JR. The construct validity of the limb apraxia test (lat): implications for the distinction between types of limb apraxia. Clinical Aphasiology. 1994; 22:181-190.
  221. Duffy JR. Emerging and future concerns in motor speech disorders. American Journal of Speech-Language Pathology. 1994; 3:36-9.
  222. Duffy JR. Path analysis. Clinical Aphasiology. 1993; 21:47-57.
  223. Duffy JR, Petersen RC. Primary progressive aphasia. Aphasiology. 1992 Jan/Feb; 6:1-15.
  224. Caselli RJ, Ivnik RJ, Duffy JR. Associative anomia: dissociating words and their definitions. Mayo Clin Proc. 1991 Aug; 66 (8):783-91
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  225. Burroughs EI, Aronson AE, Duffy JR, Kyle RA. Speech disorders in systemic amyloidosis. Br J Disord Commun. 1991 Aug; 26 (2):201-6
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  226. Duffy RJ, Duffy JR. An investigation of body part as object (BPO) responses in normal and brain-damaged adults. Brain & Cognition. 1989 Jul; 10(2):220-36.
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  227. Kelly PJ, Ahlskog JE, Goerss SJ, Daube JR, Duffy JR, Kall BA. Computer-assisted stereotactic ventralis lateralis thalamotomy with microelectrode recording control in patients with Parkinson's disease. Mayo Clin Proc. 1987 Aug; 62(8):655-64.
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  228. Duffy JR. Slowly progressive aphasia. Clinical Aphasiology. 1987; 17:349-356.
  229. Mackisack EL, Myers PS, Duffy JR. Verbosity and labeling behavior: the performance of right hemisphere and non-brain-damaged adults on an inferential picture task. Clinical Aphasiology. 1987; 17:143-151.
  230. Duffy JR. Sweet sixteen or middle age? Welcome and opening remarks. Clinical Aphasiology. 1986; (16):IV-VI.
  231. Duffy JR. Invited comment on Baratz's manual communication for a global aphasic: a case study. Aphasia Apraxia Agnosia. 1985; 3(4):27-43.
  232. Duffy JR, Watkins LB. The effect of response choice relatedness on pantomime and verbal recognition ability in aphasic patients. Brain & Language. 1984 Mar; 21(2):291-306.
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  233. Duffy JR. Nuclear magnetic resonance (NMR): background and potential impact on the practice of speech language pathology. Clinical Aphasiology. 1984; 7-13.
  234. Duffy RJ, Duffy JR, Mercaitis PM. Comparison of the performances of a fluent and a nonfluent aphasic on a pantomime referential task. Brain Lang. 1984; 21:260-273.
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  235. Duffy JR. Babies, bath water, and monkeys. Clinical Aphasiology. 1983; 285-288.
  236. Gigley HM, Duffy JR. The contribution of clinical intelligence and artificial aphasiology to clinical aphasiology and artificial intelligence. Clinical Aphasiology. 1982; 170-177.
  237. Duffy JR, Watt J, Duffy RJ. Path analysis: a strategy for investigating multivariate causal relationships in communication disorders. Journal of Speech & Hearing Research. 1981 Dec; 24(4):474-90.
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  238. Duffy JR. What is aphasia? A round table discussion. Clinical Aphasiology. 1981; 327-329.
  239. Duffy RJ, Duffy JR. Three studies of deficits in pantomime recognition and pantomime expression in aphasia. J Speech Hear Res. 1981; 24:70-84.
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  240. Duffy JR, Keith RL. Performance of non-brain-injured adults on the pica: descriptive data and a comparison to patients with aphasia. Aphasia Apraxia Agnosia. 1980; 2:1-29.
  241. Duffy JR, Boyle M, Plattner L. Listener reactions to personal characteristics of fluent and nonfluent aphasic speakers. Clinical Aphasiology. 1980; 117-126.
  242. Duffy JR, Watt J, Duffy RJ. Deficits of nonverbal communication in aphasic patients: a test of some current causal theories. Clinical Aphasiology. 1978; 153-163.
  243. Duffy JR, Keith RL, Shane HL, Podraza BL. Performance of norm (non-brain-injured) adults on the Porch index of communicative ability. Clinical Aphasiology. 1976; 32-42.
  244. Duffy RJ, Duffy JR, Pearson KL. Pantomime recognition in aphasic. J Speech Hear Res. 1975; 18:115-132.
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  245. Duffy JR, Duffy RJ, Pearson KL. Verbal comprehension and overall aphasic impairment: relationship between the token test and pica. J MSHA. 1975; 14:1-13.
  246. Duffy JR, Giolas TG. Sentence intelligibility as a function of key word selection. Journal of Speech & Hearing Research. 1974 Dec; 17(4):631-7.
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  247. Giolas TG, Duffy JR, Duffy RJ, Cooker HS, Sergeant RL. Equivalency of sentence intelligibility lists for audiological assessment of naval personnel and Navy voice communication systems. Naval Submarine Medical Research Laboratory Report. 1973 Sep; 759:1-9.
  248. Duffy JR, Giolas TG, Sergeant RL. The effect of word predictability on sentence intelligibility. Naval Submarine Medical Research Laboratory Report. 1971 Jul; 672:1-8.
  249. Giolas TG, Cooker HA, Duffy JR. Studies of voice communication in the Navy: sentence predictability. Submarine Medical Research Laboratory Naval Submarine Medical Center Report. 1971 Feb; 653:1-11.
  250. Giolas TG, Coo-Er HA, Duffy JR. The predictability of words in sentences. J Aud Res. 1970; 10:328-334.
  251. Russotti JS, Duffy JR. An evaluation of three methods of unscrambling helium speech at depths of 800 and 1000 feet. Naval Submarine Medical Research Laboratory Report. 1969 Oct; 602:1-5.
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