Publications

  1. 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 Jun 28.
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  2. 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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  3. 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 Jul 14.
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  4. Duffy JR, Strand EA, Josephs KA. Motor Speech Disorders Associated with Primary Progressive Aphasia. Aphasiology. 2014 Aug; 28(8-9):1004-17.
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  5. 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. Epub 2013 Sep 02.
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  6. 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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  7. 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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  8. 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.
  9. 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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  10. 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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  11. 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 Sep 19.
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  12. 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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  13. 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 3
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  14. 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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  15. Petroi D, Duffy JR, Strand EA, Josephs KA. Phonologic errors in the logopenic variant of primary progressive aphasia. Aphasiology. 2014; 28(10):1223-43.
  16. 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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  17. 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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  18. 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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  19. 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 Jul 09.
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  20. 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 Jul 11.
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  21. 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 Jun 26.
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  22. 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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  23. 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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  24. 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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  25. 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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  26. 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.
  27. Whitwell JL, Lowe VJ, Duffy JR, Strand EA, Josephs K. Elevated occipital β-amyloid deposition is associated with widespread cognitive impairment in logopenic progressive aphasia Journal of Neurology. 2013.
  28. 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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  29. 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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  30. 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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  31. 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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  32. 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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  33. 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.
  34. Boutsen, F, Duffy, JR, Dimassi, H, Christman. Long-term instability in ataxic dysarthria. Folia Phoniatrica et Logopaedica. 2011.
  35. 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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  36. 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.
  37. 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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  38. 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.
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  39. 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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  40. 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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  41. 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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  42. 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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  43. 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.
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  44. 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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  45. 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.
  46. 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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  47. 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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  48. 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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  49. Duffy JR. Apraxia of speech in degenerative neurologic disease. Aphasiology. 2006 Jun; 20(6):511-27.
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  50. 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.
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  51. 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.
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  52. 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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  53. 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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  54. 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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  55. 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.
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  56. 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.
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  57. 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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  58. 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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  59. Duffy JR. Managing primary progressive aphasia. (Invited article). National Aphasia Association News Bulletin. 2005 May 2.
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  60. 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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  61. 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.
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  62. 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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  63. 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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  64. 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.
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  65. 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.
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  66. 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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  67. 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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  68. 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.
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  69. 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.
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  70. 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.
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  71. 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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  72. 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.
  73. 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.
  74. 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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  75. 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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  76. 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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  77. 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.
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  78. 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.
  79. 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.
  80. 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.
  81. 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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  82. Kent RD, Kent JF, Duffy JR, Weismer G, Stuntebeck S. Ataxic dysarthria. Journal of Speech-Language-Hearing Research. 2000;43:1275-89.
  83. 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.
  84. 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.
  85. 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.
  86. 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.
  87. 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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  88. 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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  89. 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.
  90. Kent RD, Duffy JR, Vorperian HK, Thomas JE. Severe essential vocal and oromandibular tremor: A case report. Phonoscope. 1998; 1(4):237-53.
  91. 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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  92. Boutsen FR, Bakker K, Duffy JR. Subgroups in ataxic dysarthria. Journal of Medical Speech-Language Pathology. 1997; 5:27-36.
  93. Baumgartner J, Duffy JR. Psychogenic stuttering in adults with and without neurologic disease. Journal of Medical Speech-Language Pathology. 1997; 5:75-95.
  94. 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.
  95. 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.
  96. Duffy JR. Why differential diagnosis? Special Interest Division 2 Newsletter. 1995; 5:2-6.
  97. Duffy RJ, Watt JH, Duffy JR. Testing causal theories of pantominic deficits in aphasia using path analysis. Aphasiology. 1994 Jul-Aug; 8:361-379.
  98. 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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  99. 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.
  100. Duffy JR. Emerging and future concerns in motor speech disorders. American Journal of Speech-Language Pathology. 1994; 3:36-9.
  101. Duffy JR. Path analysis. Clinical Aphasiology. 1993; 21:47-57.
  102. Duffy JR, Petersen RC. Primary progressive aphasia. Aphasiology. 1992 Jan/Feb; 6:1-15.
  103. 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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  104. 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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  105. 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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  106. 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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  107. 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.
  108. Duffy JR. Slowly progressive aphasia. Clinical Aphasiology. 1987; 17:349-356.
  109. Duffy JR. Sweet sixteen or middle age? Welcome and opening remarks. Clinical Aphasiology. 1986; (16):IV-VI.
  110. Duffy JR. Invited comment on Baratz's manual communication for a global aphasic: a case study. Aphasia Apraxia Agnosia. 1985; 3(4):27-43.
  111. 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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  112. Duffy JR. Nuclear magnetic resonance (NMR): background and potential impact on the practice of speech language pathology. Clinical Aphasiology. 1984; 7-13.
  113. 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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  114. Duffy JR. Babies, bath water, and monkeys. Clinical Aphasiology. 1983; 285-288.
  115. Gigley HM, Duffy JR. The contribution of clinical intelligence and artificial aphasiology to clinical aphasiology and artificial intelligence. Clinical Aphasiology. 1982; 170-177.
  116. 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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  117. Duffy JR. What is aphasia? A round table discussion. Clinical Aphasiology. 1981; 327-329.
  118. 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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  119. Duffy JR, Boyle M, Plattner L. Listener reactions to personal characteristics of fluent and nonfluent aphasic speakers. Clinical Aphasiology. 1980; 117-126.
  120. 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.
  121. 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.
  122. 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.
  123. Duffy RJ, Duffy JR, Pearson KL. Pantomime recognition in aphasic. J Speech Hear Res. 1975; 18:115-132.
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  124. 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.
  125. 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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  126. Giolas TG, Duff JR. Equivalency of CID and revised CID sentence lists. Journal of Speech & Hearing Research. 1973 Dec; 16(4):549-55.
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  127. 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.
  128. 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.
  129. 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.
  130. Giolas TG, Coo-Er HA, Duffy JR. The predictability of words in sentences. J Aud Res. 1970; 10:328-334.
  131. 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.