Publications

  1. 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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  2. 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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  3. Tetzloff KA, Duffy JR, Clark HM, Utianski RL, Strand EA, Machulda MM, Botha H, Martin PR, Schwarz CG, Senjem ML, Reid RI, Gunter JL, Spychalla AJ, Knopman DS, Petersen RC, Jack CR, Lowe VJ, Josephs KA, Whitwell JL. Progressive agrammatic aphasia without apraxia of speech as a distinct syndrome. Brain. 2019 Aug 1; 142 (8):2466-2482
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  4. Whitwell JL, Stevens CA, Duffy JR, Clark HM, Machulda MM, Strand EA, Martin PR, Utianski RL, Botha H, Spychalla AJ, Senjem ML, Schwarz CG, Jack CR Jr, Ali F, Hassan A, Josephs KA. An Evaluation of the Progressive Supranuclear Palsy Speech/Language Variant. Mov Disord Clin Pract. 2019 Jul; 6 (6):452-461 Epub 2019 May 29
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  5. Whitwell JL, Martin PR, Duffy JR, Clark HM, Machulda MM, Schwarz CG, Weigand SD, Sintini I, Senjem ML, Ertekin-Taner N, Botha H, Utianski RL, Graff-Radford J, Jones DT, Boeve BF, Knopman DS, Petersen RC, Jack CR Jr, Lowe VJ, Josephs KA. The influence of beta-amyloid on [(18)F]AV-1451 in semantic variant of primary progressive aphasia. Neurology. 2019 Feb 12; 92 (7):e710-e722 Epub 2019 Jan 11
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  6. Utianski RL, Botha H, Duffy JR, Clark HM, Martin PR, Butts AM, Machulda MM, Whitwell JL, Josephs KA. Rapid rate on quasi-speech tasks in the semantic variant of primary progressive aphasia: A non-motor phenomenon? J Acoust Soc Am. 2018 Dec; 144 (6):3364
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  7. Utianski RL, Duffy JR, Clark HM, Strand EA, Boland SM, Machulda MM, Whitwell JL, Josephs KA. Clinical Progression in Four Cases of Primary Progressive Apraxia of Speech. Am J Speech Lang Pathol. 2018 Nov 21; 27 (4):1303-1318
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  8. Utianski RL, Whitwell JL, Schwarz CG, Duffy JR, Botha H, Clark HM, Machulda MM, Senjem ML, Knopman DS, Petersen RC, Jack CR Jr, Lowe VJ, Josephs KA. Tau uptake in agrammatic primary progressive aphasia with and without apraxia of speech. Eur J Neurol. 2018 Nov; 25 (11):1352-1357 Epub 2018 July 26
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  9. Tetzloff KA, Whitwell JL, Utianski RL, Duffy JR, Clark HM, Machulda MM, Strand EA, Josephs KA. Quantitative assessment of grammar in amyloid-negative logopenic aphasia. Brain Lang. 2018 Nov; 186:26-31 Epub 2018 Sept 08
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  10. Tetzloff KA, Utianski RL, Duffy JR, Clark HM, Strand EA, Josephs KA, Whitwell JL. Quantitative Analysis of Agrammatism in Agrammatic Primary Progressive Aphasia and Dominant Apraxia of Speech. J Speech Lang Hear Res. 2018 Sep 19; 61 (9):2337-2346
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  11. 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. Prosodic and phonetic subtypes of primary progressive apraxia of speech. Brain Lang. 2018 Sep; 184:54-65 Epub 2018 July 04
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  12. Botha H, Duffy JR, Whitwell JL, Strand EA, Machulda MM, Spychalla AJ, Tosakulwong N, Senjem ML, Knopman DS, Petersen RC, Jack CR Jr, Lowe VJ, Josephs KA. Non-right handed primary progressive apraxia of speech. J Neurol Sci. 2018 Jul 15; 390:246-254 Epub 2018 May 07
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  13. Tetzloff KA, Duffy JR, Strand EA, Machulda MM, Boland SM, Utianski RL, Botha H, Senjem ML, Schwarz CG, Josephs KA, Whitwell JL. Clinical and imaging progression over 10 years in a patient with primary progressive apraxia of speech and autopsy-confirmed corticobasal degeneration. Neurocase. 2018 Apr; 24 (2):111-120 Epub 2018 May 25
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  14. Utianski RL, Duffy JR, Savica R, Whitwell JL, Machulda MM, Josephs KA. Molecular neuroimaging in primary progressive aphasia with predominant agraphia. Neurocase. 2018 Apr; 24 (2):121-123 Epub 2018 Mar 23
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  15. Josephs KA, Martin PR, Botha H, Schwarz CG, Duffy JR, Clark HM, Machulda MM, Graff-Radford J, Weigand SD, Senjem ML, Utianski RL, Drubach DA, Boeve BF, Jones DT, Knopman DS, Petersen RC, Jack CR Jr, Lowe VJ, Whitwell JL. [(18) F]AV-1451 tau-PET and primary progressive aphasia. Ann Neurol. 2018 Mar; 83 (3):599-611 Epub 2018 Mar 13
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  16. Utianski RL, Whitwell JL, Schwarz CG, Senjem ML, Tosakulwong N, Duffy JR, Clark HM, Machulda MM, Petersen RC, Jack CR Jr, Lowe VJ, Josephs KA. Tau-PET imaging with [18F]AV-1451 in primary progressive apraxia of speech. Cortex. 2018 Feb; 99:358-374 Epub 2018 Jan 02
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  17. Botha H, Utianski RL, Whitwell JL, Duffy JR, Clark HM, Strand EA, Machulda MM, Tosakulwong N, Knopman DS, Petersen RC, Jack CR Jr, Josephs KA, Jones DT. Disrupted functional connectivity in primary progressive apraxia of speech. Neuroimage Clin. 2018; 18:617-629 Epub 2018 Mar 03
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  18. Duffy JR. He struggled with walking and talking … But why? ASHA Leader. 2018; 23 (2):44-5
  19. Tetzloff KA, Graff-Radford J, Martin PR, Tosakulwong N, Machulda MM, Duffy JR, Clark HM, Senjem ML, Schwarz CG, Spychalla AJ, Drubach DA, Jack CR, Lowe VJ, Josephs KA, Whitwell JL. Regional Distribution, Asymmetry, and Clinical Correlates of Tau Uptake on [18F]AV-1451 PET in Atypical Alzheimer's Disease. J Alzheimers Dis. 2018; 62 (4):1713-1724
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  20. Tetzloff KA, Duffy JR, Clark HM, Strand EA, Machulda MM, Schwarz CG, Senjem ML, Reid RI, Spychalla AJ, Tosakulwong N, Lowe VJ, Jack CR Jr, Josephs KA, Whitwell JL. Longitudinal structural and molecular neuroimaging in agrammatic primary progressive aphasia. Brain. 2018 Jan 1; 141 (1):302-317
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  21. Owens TE, Machulda MM, Duffy JR, Strand EA, Clark HM, Boland S, Martin PR, Lowe VJ, Jack CR, Whitwell JL, Josephs KA. Patterns of neuropsychological dysfunction and cortical volume changes in logopenic aphasia Journal Of Alzheimers Disease. 2018; 66 (3):1015-25
  22. Whitwell JL, Weigand SD, Duffy JR, Clark HM, Strand EA, Machulda MM, Spychalla AJ, Senjem ML, Jack CR Jr, Josephs KA. Predicting clinical decline in progressive agrammatic aphasia and apraxia of speech. Neurology. 2017 Nov 28; 89 (22):2271-2279 Epub 2017 Nov 01
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  23. Whitwell JL, Duffy JR, Machulda MM, Clark HM, Strand EA, Senjem ML, Gunter JL, Spychalla AJ, Petersen RC, Jack CR Jr, Josephs KA. Tracking the development of agrammatic aphasia: A tensor-based morphometry study. Cortex. 2017 May; 90:138-148 Epub 2016 Sept 30
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  24. Duffy JR, Hanley H, Utianski R, Clark H, Strand E, Josephs KA, Whitwell JL. Temporal acoustic measures distinguish primary progressive apraxia of speech from primary progressive aphasia. Brain Lang. 2017 May; 168:84-94 Epub 2017 Feb 07
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  25. Krishnan K, Machulda MM, Whitwell JL, Butts AM, Duffy JR, Strand EA, Senjem ML, Spychalla AJ, Jack CR, Lowe VJ, Josephs KA. Varying Degrees of Temporoparietal Hypometabolism on FDG-PET Reveal Amyloid-Positive Logopenic Primary Progressive Aphasia is not a Homogeneous Clinical Entity. J Alzheimers Dis. 2017; 55 (3):1019-1029
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  26. Matsumoto JY, Fossett T, Kim M, Duffy JR, Strand E, McKeon A, Lee KH, Stead M, Burnett M, Adams AC, Klassen BT. Precise stimulation location optimizes speech outcomes in essential tremor. Parkinsonism Relat Disord. 2016 Nov; 32:60-65 Epub 2016 Aug 25
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  27. Duffy JR. Motor Speech Disorders: Where Will We Be in 10 Years? Semin Speech Lang. 2016 Aug; 37 (3):219-24 Epub 2016 May 27
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  28. Jung Y, Whitwell JL, Duffy JR, Strand EA, Machulda MM, Senjem ML, Jack CR, Lowe VJ, Josephs KA. Regional beta-amyloid burden does not correlate with cognitive or language deficits in Alzheimer's disease presenting as aphasia. Eur J Neurol. 2016 Feb; 23 (2):313-9 Epub 2015 June 23
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  29. Ballard KJ, Azizi L, Duffy JR, McNeil MR, Halaki M, O'Dwyer N, Layfield C, Scholl DI, Vogel AP, Robin DA. A predictive model for diagnosing stroke-related apraxia of speech. Neuropsychologia. 2016 Jan 29; 81:129-139 Epub 2015 Dec 19
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  30. Whitwell JL, Weigand SD, Duffy JR, Strand EA, Machulda MM, Senjem ML, Gunter JL, Lowe VJ, Jack CR Jr, Josephs KA. Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speech. Neuroimage Clin. 2016; 11:90-98 Epub 2016 Jan 20
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  31. Madhavan A, Schwarz CG, Duffy JR, Strand EA, Machulda MM, Drubach DA, Kantarci K, Przybelski SA, Reid RI, Senjem ML, Gunter JL, Apostolova LG, Lowe VJ, Petersen RC, Jack CR, Josephs KA, Whitwell JL. Characterizing White Matter Tract Degeneration in Syndromic Variants of Alzheimer's Disease: A Diffusion Tensor Imaging Study. J Alzheimers Dis. 2016; 49: (3)633-43.
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  32. Flanagan EP, Duffy JR, Whitwell JL, Vemuri P, Dickson DW, Josephs KA. Mixed tau and TDP-43 pathology in a patient with unclassifiable primary progressive aphasia. Neurocase. 2016; 22 (1):55-9 Epub 2015 May 01
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  33. Duffy JR. Functional speech disorders: clinical manifestations, diagnosis, and management. Handb Clin Neurol. 2016; 139:379-388
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  34. Norby E, Orbelo D, Strand E, Duffy JR, Duffy J, Ekbom D, Bower J, Matsumoto JY, Norby EE. Hyoid muscle dystonia: A distinct focal dystonia syndrome. Parkinsonism Relat Disord. 2015 Oct; 21: (10)1210-3.
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  35. Whitwell JL, Duffy JR, Strand EA, Machulda MM, Tosakulwong N, Weigand SD, Senjem ML, Spychalla AJ, Gunter JL, Petersen RC, Jack CR Jr, Josephs KA. Sample size calculations for clinical trials targeting tauopathies: a new potential disease target. J Neurol. 2015 Sep; 262 (9):2064-72 Epub 2015 June 17
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  36. Botha H, Duffy JR, Whitwell JL, Strand EA, Machulda MM, Schwarz CG, Reid RI, Spychalla AJ, Senjem ML, Jones DT, Lowe V, Jack CR, Josephs KA. Classification and clinicoradiologic features of primary progressive aphasia (PPA) and apraxia of speech. Cortex. 2015 Aug; 69:220-36 Epub 2015 May 27
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  37. Butts AM, Machulda MM, Duffy JR, Strand EA, Whitwell JL, Josephs KA. Neuropsychological Profiles Differ among the Three Variants of Primary Progressive Aphasia. J Int Neuropsychol Soc. 2015 Jul; 21 (6):429-35 Epub 2015 June 11
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  38. Whitwell JL, Duffy JR, Strand EA, Machulda MM, Senjem ML, Schwarz CG, Reid R, Baker MC, Perkerson RB, Lowe VJ, Rademakers R, Jack CR Jr, Josephs KA. Clinical and neuroimaging biomarkers of amyloid-negative logopenic primary progressive aphasia. Brain Lang. 2015 Mar; 142:45-53 Epub 2015 Feb 03
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  39. Whitwell JL, Jones DT, Duffy JR, Strand EA, Machulda MM, Przybelski SA, Vemuri P, Gregg BE, Gunter JL, Senjem ML, Petersen RC, Jack CR Jr, Josephs KA. Working memory and language network dysfunctions in logopenic aphasia: a task-free fMRI comparison with Alzheimer's dementia. Neurobiol Aging. 2015 Mar; 36 (3):1245-52 Epub 2014 Dec 16
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  40. Ballard KJ, Wambaugh JL, Duffy JR, Layfield C, Maas E, Mauszycki S, McNeil MR. Treatment for acquired apraxia of speech: A systematic review of intervention research between 2004 and 2012. Am J Speech Lang Pathol. 2015; 24(2):316-37.
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  41. Duffy JR, Strand EA, Clark H, Machulda M, Whitwell JL, Josephs KA. Primary progressive apraxia of speech: Clinical features and acoustic and neurologic correlates. Am J Speech Lang Pathol. 2015; 24(2):88-100.
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  42. Flanagan EP, Baker MC, Perkerson RB, Duffy JR, Strand EA, Whitwell JL, Machulda MM, Rademakers R, Josephs KA. Dominant frontotemporal dementia mutations in 140 cases of primary progressive aphasia and speech apraxia. Dement Geriatr Cogn Disord. 2015; 39 (5-6):281-6 Epub 2015 Feb 28
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  43. New AB, Robin DA, Parkinson AL, Duffy JR, McNeil MR, Piguet O, Hornberger M, Price CJ, Eickhoff SB, Ballard KJ. Altered resting-state network connectivity in stroke patients with and without apraxia of speech. Neuroimage Clin. 2015; 8:429-39 Epub 2015 Mar 25
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  44. Whitwell JL, Kantarci K, Weigand SD, Lundt ES, Gunter JL, Duffy JR, Strand EA, Machulda MM, Spychalla AJ, Drubach DA, Petersen RC, Lowe VJ, Jack CR Jr, Josephs KA. Microbleeds in atypical presentations of Alzheimer's disease: a comparison to dementia of the Alzheimer's type. J Alzheimers Dis. 2015; 45 (4):1109-17
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  45. Singh TD, Duffy JR, Strand EA, Machulda MM, Whitwell JL, Josephs KA. Neuropsychiatric symptoms in primary progressive aphasia and apraxia of speech. Dement Geriatr Cogn Disord. 2015; 39 (3-4):228-38 Epub 2015 Jan 21
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  46. Josephs KA, Duffy JR, Strand EA, Machulda MM, Senjem ML, Lowe VJ, Jack CR Jr, Whitwell JL. APOE epsilon4 influences beta-amyloid deposition in primary progressive aphasia and speech apraxia. Alzheimers Dement. 2014 Nov; 10 (6):630-6 Epub 2014 June 28
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  47. Josephs KA, Duffy JR, Strand EA, Machulda MM, Senjem ML, Gunter JL, Schwarz CG, Reid RI, Spychalla AJ, Lowe VJ, Jack CR Jr, Whitwell JL. The evolution of primary progressive apraxia of speech. Brain. 2014 Oct; 137 (Pt 10):2783-95 Epub 2014 Aug 11
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  48. Strand EA, Duffy JR, Clark HM, Josephs K. The Apraxia of Speech Rating Scale: a tool for diagnosis and description of apraxia of speech. J Commun Disord. 2014 Sep-Oct; 51:43-50 Epub 2014 July 14
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  49. Graff-Radford J, Benarroch EE, Duffy JR, Drubach DA. Fluorodeoxyglucose F18 positron emission tomography in a case of slowly progressive pure alexia. Neurocase. 2014 Aug; 20: (4)476-9.
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  50. Duffy JR, Strand EA, Josephs KA. Motor Speech Disorders Associated with Primary Progressive Aphasia. Aphasiology. 2014 Aug; 28 (8-9):1004-1017
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  51. Jung Y, Whitwell JL, Duffy JR, Strand EA, Machulda MM, Senjem ML, Lowe V, Jack CR Jr, Josephs KA. Amyloid burden correlates with cognitive decline in Alzheimer's disease presenting with aphasia. Eur J Neurol. 2014 Jul; 21 (7):1040-3 Epub 2013 Dec 16
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  52. Botha H, Duffy JR, Strand EA, Machulda MM, Whitwell JL, Josephs KA. Nonverbal oral apraxia in primary progressive aphasia and apraxia of speech. Neurology. 2014 May 13; 82 (19):1729-35 Epub 2014 Apr 11
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  53. Vergis MK, Ballard KJ, Duffy JR, McNeil MR, Scholl D, Layfield C. An acoustic measure of lexical stress differentiates aphasia and aphasia plus apraxia of speech after stroke. Aphasiology. 2014 May; 28(5):554-75.
  54. Wicklund MR, Duffy JR, Strand EA, Machulda MM, Whitwell JL, Josephs KA. Quantitative application of the primary progressive aphasia consensus criteria. Neurology. 2014 Apr 1; 82 (13):1119-26 Epub 2014 Mar 05
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  55. Josephs KA, Duffy JR, Strand EA, Machulda MM, Vemuri P, Senjem ML, Perkerson RB, Baker MC, Lowe V, Jack CR Jr, Rademakers R, Whitwell JL. Progranulin-associated PiB-negative logopenic primary progressive aphasia. J Neurol. 2014 Mar; 261 (3):604-14 Epub 2014 Jan 22
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  56. Clark HM, Duffy JR, Whitwell JL, Ahlskog JE, Sorenson EJ, Josephs KA. Clinical and imaging characterization of progressive spastic dysarthria. Eur J Neurol. 2014 Mar; 21 (3):368-76 Epub 2013 Sept 19
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  57. 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 Feb; 129:43-6 Epub 2014 Feb 18
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  58. Whitwell JL, Jack CR Jr, Duffy JR, Strand EA, Gunter JL, Senjem ML, Murphy MC, Kantarci K, Machulda MM, Lowe VJ, Josephs KA. Microbleeds in the logopenic variant of primary progressive aphasia. Alzheimers Dement. 2014 Jan; 10 (1):62-6 Epub 2013 Apr 03
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  59. Orbelo DM, Duffy JR, Hughes Borst BJ, Ekbom D, Maragos NE. Differences in botulinum toxin dosing between patients with adductor spasmodic dysphonia and essential voice tremor. J Voice. 2014 Jan; 28(1):123-7. Epub 2013 Sep 27.
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  60. Dietsch AM, Solomon NP, Sharkey LA, Duffy JR, Strand EA, Clark HM. Perceptual and instrumental assessments of orofacial muscle tone in dysarthric and normal speakers. J Rehabil Res Dev. 2014; 51(7):1127-42.
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  61. Petroi D, Duffy JR, Strand EA, Josephs KA. Phonologic errors in the logopenic variant of primary progressive aphasia. Aphasiology. 2014; 28(10):1223-43.
  62. Whitwell JL, Lowe VJ, Duffy JR, Strand EA, Machulda MM, Kantarci K, Wille SM, Senjem ML, Murphy MC, Gunter JL, Jack CR Jr, Josephs KA. Elevated occipital beta-amyloid deposition is associated with widespread cognitive impairment in logopenic progressive aphasia. J Neurol Neurosurg Psychiatry. 2013 Dec; 84 (12):1357-64 Epub 2013 Aug 14
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  63. Machulda MM, Whitwell JL, Duffy JR, Strand EA, Dean PM, Senjem ML, Jack CR Jr, Josephs KA. Identification of an atypical variant of logopenic progressive aphasia. Brain Lang. 2013 Nov; 127 (2):139-44 Epub 2013 Apr 06
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  64. Jung Y, Duffy JR, Josephs KA. Primary progressive aphasia and apraxia of speech. Semin Neurol. 2013 Sep; 33 (4):342-7 Epub 2013 Nov 14
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  65. Josephs KA, Papenfuss SM, Duffy JR, Strand EA, Machulda MM, Whitwell JL, Petersen RC. Occupational differences between Alzheimer's and aphasic dementias: implication for teachers. Am J Alzheimers Dis Other Demen. 2013 Sep; 28 (6):612-6 Epub 2013 July 09
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  66. Wicklund MR, Duffy JR, Strand EA, Whitwell JL, Machulda MM, Josephs KA. Aphasia with left occipitotemporal hypometabolism: a novel presentation of posterior cortical atrophy? J Clin Neurosci. 2013 Sep; 20 (9):1237-40 Epub 2013 July 11
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  67. Josephs KA, Duffy JR, Strand EA, Machulda MM, Senjem ML, Lowe VJ, Jack CR Jr, Whitwell JL. Syndromes dominated by apraxia of speech show distinct characteristics from agrammatic PPA. Neurology. 2013 Jul 23; 81 (4):337-45 Epub 2013 June 26
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  68. Whitwell JL, Duffy JR, Strand EA, Xia R, Mandrekar J, Machulda MM, Senjem ML, Lowe VJ, Jack CR Jr, Josephs KA. Distinct regional anatomic and functional correlates of neurodegenerative apraxia of speech and aphasia: an MRI and FDG-PET study. Brain Lang. 2013 Jun; 125 (3):245-52 Epub 2013 Mar 28
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  69. Adeli A, Whitwell JL, Duffy JR, Strand EA, Josephs KA. Ideomotor apraxia in agrammatic and logopenic variants of primary progressive aphasia. J Neurol. 2013 Jun; 260 (6):1594-600 Epub 2013 Jan 29
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  70. Whitwell JL, Duffy JR, Strand EA, Machulda MM, Senjem ML, Gunter JL, Kantarci K, Eggers SD, Jack CR Jr, Josephs KA. Neuroimaging comparison of primary progressive apraxia of speech and progressive supranuclear palsy. Eur J Neurol. 2013 Apr; 20 (4):629-37 Epub 2012 Oct 18
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  71. Madhavan A, Whitwell JL, Weigand SD, Duffy JR, Strand EA, Machulda MM, Tosakulwong N, Senjem ML, Gunter JL, Lowe VJ, Petersen RC, Jack CR Jr, Josephs KA. FDG PET and MRI in logopenic primary progressive aphasia versus dementia of the Alzheimer's type. PLoS One. 2013; 8 (4):e62471 Epub 2013 Apr 23
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  72. Madhaven A, Whitwell JL, Weigland SD, Duffy JR, et al. PDG PET and MRI in logopenic primary progressive aphasia versus dementia of the Alzheimer's type PLOS ONE. 2013.
  73. Duffy JR, Josephs KA. The diagnosis and understanding of apraxia of speech: why including neurodegenerative etiologies may be important. J Speech Lang Hear Res. 2012 Oct; 55 (5):S1518-22
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  74. Graff-Radford J, Duffy JR, Strand EA, Josephs KA. Parkinsonian motor features distinguish the agrammatic from logopenic variant of primary progressive aphasia. Parkinsonism Relat Disord. 2012 Aug; 18 (7):890-2 Epub 2012 May 08
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  75. Josephs KA, Duffy JR, Strand EA, Machulda MM, Senjem ML, Master AV, Lowe VJ, Jack CR Jr, Whitwell JL. Characterizing a neurodegenerative syndrome: primary progressive apraxia of speech. Brain. 2012 May; 135 (Pt 5):1522-36 Epub 2012 Mar 01
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  76. Czarnecki K, Thompson JM, Seime R, Geda YE, Duffy JR, Ahlskog JE. Functional movement disorders: successful treatment with a physical therapy rehabilitation protocol. Parkinsonism Relat Disord. 2012 Mar; 18(3):247-51. Epub 2011 Nov 22.
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  77. Kumar N, Boeve BF, Boot BP, Orr CF, Duffy J, Woodruff BK, Nair AK, Ellison J, Kuntz K, Kantarci K, Jack CR Jr, Westmoreland BF, Fields JA, Baker M, Rademakers R, Parisi JE, Dickson DW. Clinical characterization of a kindred with a novel 12-octapeptide repeat insertion in the prion protein gene. Arch Neurol. 2011 Sep; 68 (9):1165-70
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  78. Boutsen F, Duffy JR, Dimassi H, Christman SS. Long-term phonatory instability in ataxic dysarthria. Folia Phoniatr Logop. 2011; 63(4):216-20. Epub 2010 Nov 19.
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  79. Boutsen, F, Duffy, JR, Dimassi, H, Christman. Long-term instability in ataxic dysarthria. Folia Phoniatrica et Logopaedica. 2011.
  80. Fatemi Y Boeve BF, Duffy JR, Petersen RC, Knopman DS, Cejka V, Smith GE. Neuropsychiatric aspects of primary progressive aphasia Neuropsychiatry Clin Neurosci. 2011; 23:168.
  81. Kim Y, Kent RD, Kent JF, Duffy JR. Perceptual and acoustic features of dysarthria in multiple system atrophy. J Med Speech Lang Pathol. 2010 Dec; 18(4):66-70.
  82. Josephs KA, Duffy JR, Fossett TR, Strand EA, Claassen DO, Whitwell JL, Peller PJ. Fluorodeoxyglucose F18 positron emission tomography in progressive apraxia of speech and primary progressive aphasia variants. Arch Neurol. 2010 May; 67: (5)596-605.
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  83. Wang Y, Kent RD, Kent JF, Duffy JR, Thomas JE. Acoustic analysis of voice in dysarthria following stroke. Clin Linguist Phon. 2009 May; 23(5):335-47.
  84. Wang YT, Kent RD, Duffy JR, Thomas JE. Analysis of diadochokinesis in ataxic dysarthria using the motor speech profile program. Folia Phoniatr Logop. 2009; 61(1):1-11. Epub 2008 Dec 17.
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  85. Kim Y, Weismer G, Kent RD, Duffy JR. Statistical models of F2 slope in relation to severity of dysarthria. Folia Phoniatr Logop. 2009; 61(6):329-35. Epub 2009 Oct 28.
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  86. Czarnecki K, Duffy JR, Nehl CR, Cross SA, Molano JR, Jack CR Jr, Shiung MM, Josephs KA, Boeve BF. Very early semantic dementia with progressive temporal lobe atrophy: an 8-year longitudinal study. Arch Neurol. 2008 Dec; 65 (12):1659-63
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  87. Josephs KA, Duffy JR. Apraxia of speech and nonfluent aphasia: a new clinical marker for corticobasal degeneration and progressive supranuclear palsy. Curr Opin Neurol. 2008 Dec; 21(6):688-92.
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  88. Duffy JR. Motor speech disorders and the diagnosis of neurologic disease: still a well-kept secret? ASHA Leader. 2008 Nov 25; 13(16):10-3.
  89. Josephs KA, Whitwell JL, Duffy JR, Vanvoorst WA, Strand EA, Hu WT, Boeve BF, Graff-Radford NR, Parisi JE, Knopman DS, Dickson DW, Jack CR Jr, Petersen RC. Progressive aphasia secondary to Alzheimer disease vs FTLD pathology. Neurology. 2008 Jan 1; 70 (1):25-34
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  90. Kim Y, Weismer G, Kent R, Duffy JR. Effect of level of presentation on scaled speech intelligibility of speakers with dysarthria: further data. Journal of the Acoustical Society of America. 2008.
  91. Bunton K, Kent RD, Duffy JR, Rosenbek JC, Kent JF. Listener agreement for auditory-perceptual ratings of dysarthria. J Speech Lang Hear Res. 2007 Dec; 50(6):1481-95.
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  92. Duffy JR, Peach RK, Strand EA. Progressive apraxia of speech as a sign of motor neuron disease. Am J Speech Lang Pathol. 2007 Aug; 16: (3)198-208.
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  93. Josephs KA, Duffy JR, Strand EA, Whitwell JL, Layton KF, Parisi JE, Hauser MF, Witte RJ, Boeve BF, Knopman DS, Dickson DW, Jack CR Jr, Petersen RC. Clinicopathological and imaging correlates of progressive aphasia and apraxia of speech. Brain. 2006 Jun; 129 (Pt 6):1385-98 Epub 2006 Apr 13
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  94. Duffy JR. Apraxia of speech in degenerative neurologic disease. Aphasiology. 2006 Jun; 20(6):511-27.
  95. Shriberg LD, Ballard KJ, Tomblin JB, Duffy JR, Odell KH, Williams CA. Speech, prosody, and voice characteristics of a mother and daughter with a 7;13 translocation affecting FOXP2. J Speech Lang Hear Res. 2006 Jun; 49(3):500-25.
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  96. Wambaugh JL, Duffy JR, McNeil MR, Robin DA, Rogers MA, Boyle M. Treatment guidelines for acquired apraxia of speech: a synthesis and evaluation of the evidence. J Med Speech Lang Pathol. 2006 Jun; 14(2):xv-xxxiii.
  97. Wambaugh JL, Duffy JR, McNeil MR, Robin DA, Rogers MA. Treatment guidelines for acquired apraxia of speech: treatment descriptions and recommendations. J Med Speech Lang Pathol. 2006 Jun; 14(2):xxxv-lxvii.
  98. Rosen KM, Kent RD, Delaney AL, Duffy JR. Parametric quantitative acoustic analysis of conversation produced by speakers with dysarthria and healthy speakers. J Speech Lang Hear Res. 2006 Apr; 49(2):395-411.
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  99. Josephs KA, Petersen RC, Knopman DS, Boeve BF, Whitwell JL, Duffy JR, Parisi JE, Dickson DW. Clinicopathologic analysis of frontotemporal and corticobasal degenerations and PSP. Neurology. 2006 Jan 10; 66(1):41-8.
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  100. Wang YT, Kent RD, Duffy JR, Thomas JE, Fredericks GV. Dysarthria following cerebellar mutism secondary to resection of a fourth ventricle medulloblastoma: A case study. J Med Speech Lang Pathol. 2006; 14(2):109-22.
  101. Baylor CR, Yorkston KM, Eadie TL, Strand EA, Duffy J. A systematic review of outcome measurement in unilateral vocal fold paralysis. J Med Speech Lang Pathol. 2006; 14(1):xxvii-lvii.
  102. Josephs KA, Boeve BF, Duffy JR, Smith GE, Knopman DS, Parisi JE, Petersen RC, Dickson DW. Atypical progressive supranuclear palsy underlying progressive apraxia of speech and nonfluent aphasia. Neurocase. 2005 Aug; 11(4):283-96.
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  103. 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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  104. Duffy JR. Managing primary progressive aphasia. (Invited article). National Aphasia Association News Bulletin. 2005 May 2.
  105. 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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  106. Wang YT, Kent RD, Duffy JR, Thomas JE. Dysarthria in traumatic brain injury: a breath group and international analysis. Folia Phoniatrica et Logopaedica. 2005 Mar-Apr; 57(2):59-89.
  107. 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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  108. Wang YT, Kent RD, Duffy JR, Thomas JE, Weismer G. Alternating motion rate as an index of speech motor disorder in traumatic brain injury. Clin Linguist Phon. 2004 Jan-Feb; 18(1):57-84.
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  109. 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.
  110. 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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  111. 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.
  112. 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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  113. 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.
  114. 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.
  115. 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.
  116. 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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  117. 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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  118. 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.
  119. 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;
  120. 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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  121. 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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  122. 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.
  123. 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.
  124. 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.
  125. 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.
  126. 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):133-43.
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  127. Kent RD, Kent JF, Duffy JR, Weismer G, Stuntebeck S. Ataxic dysarthria. Journal of Speech-Language-Hearing Research. 2000;43:1275-89.
  128. 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.
  129. 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.
  130. 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.
  131. 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.
  132. 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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  133. 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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  134. 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.
  135. Kent RD, Duffy JR, Vorperian HK, Thomas JE. Severe essential vocal and oromandibular tremor: A case report. Phonoscope. 1998; 1(4):237-53.
  136. 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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  137. Boutsen FR, Bakker K, Duffy JR. Subgroups in ataxic dysarthria. Journal of Medical Speech-Language Pathology. 1997; 5:27-36.
  138. Baumgartner J, Duffy JR. Psychogenic stuttering in adults with and without neurologic disease. Journal of Medical Speech-Language Pathology. 1997; 5:75-95.
  139. 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.
  140. 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.
  141. Duffy JR. Why differential diagnosis? Special Interest Division 2 Newsletter. 1995; 5:2-6.
  142. Duffy RJ, Watt JH, Duffy JR. Testing causal theories of pantominic deficits in aphasia using path analysis. Aphasiology. 1994 Jul-Aug; 8:361-379.
  143. 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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  144. 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.
  145. Duffy JR. Emerging and future concerns in motor speech disorders. American Journal of Speech-Language Pathology. 1994; 3:36-9.
  146. Duffy JR. Path analysis. Clinical Aphasiology. 1993; 21:47-57.
  147. Duffy JR, Petersen RC. Primary progressive aphasia. Aphasiology. 1992 Jan/Feb; 6:1-15.
  148. 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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  149. 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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  150. 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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  151. 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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  152. Duffy JR. Slowly progressive aphasia. Clinical Aphasiology. 1987; 17:349-356.
  153. 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.
  154. Duffy JR. Sweet sixteen or middle age? Welcome and opening remarks. Clinical Aphasiology. 1986; (16):IV-VI.
  155. Duffy JR. Invited comment on Baratz's manual communication for a global aphasic: a case study. Aphasia Apraxia Agnosia. 1985; 3(4):27-43.
  156. 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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  157. Duffy JR. Nuclear magnetic resonance (NMR): background and potential impact on the practice of speech language pathology. Clinical Aphasiology. 1984; 7-13.
  158. 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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  159. Duffy JR. Babies, bath water, and monkeys. Clinical Aphasiology. 1983; 285-288.
  160. Gigley HM, Duffy JR. The contribution of clinical intelligence and artificial aphasiology to clinical aphasiology and artificial intelligence. Clinical Aphasiology. 1982; 170-177.
  161. 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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  162. Duffy JR. What is aphasia? A round table discussion. Clinical Aphasiology. 1981; 327-329.
  163. 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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  164. 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.
  165. Duffy JR, Boyle M, Plattner L. Listener reactions to personal characteristics of fluent and nonfluent aphasic speakers. Clinical Aphasiology. 1980; 117-126.
  166. 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.
  167. 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.
  168. Duffy RJ, Duffy JR, Pearson KL. Pantomime recognition in aphasic. J Speech Hear Res. 1975; 18:115-132.
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  169. 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.
  170. 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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  171. 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.
  172. 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.
  173. 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.
  174. Giolas TG, Coo-Er HA, Duffy JR. The predictability of words in sentences. J Aud Res. 1970; 10:328-334.
  175. 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.