Publications - Joseph R. Duffy, Ph.D.

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  1. 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 Apr 06. [Epub ahead of print]
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  2. 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. 2013 Apr 03. [Epub ahead of print]
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  3. 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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  4. Whitwell JL, Duffy JR, Strand EA, Xia R, Mandrekar J, Machulda MM, Senjem ML, Lowe VJ, Jack Jr CR, Josephs KA. Distinct regional anatomic and functional correlates of neurodegenerative apraxia of speech and aphasia: An MRI and FDG-PET study. Brain Lang. 2013 Mar 28; 125(3):245-52. [Epub ahead of print]
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  5. Adeli A, Whitwell JL, Duffy JR, Strand EA, Josephs KA. Ideomotor apraxia in agrammatic and logopenic variants of primary progressive aphasia. J Neurol. 2013 Jan 29. [Epub ahead of print]
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  6. 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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  7. 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.
  8. 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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  9. 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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  10. 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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  11. 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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  12. Whitwell JL, Duffy JR, Strand EA, Machulda MM, Senjem ML, Gunter, JL, Kantarci K, Eggers SD, Jack CR, Josephs KA. Neuroimaging comparison of primary progressive apraxia of speech and progressive supranuclear palsy European Journal of Neurology. 2012; 20(4):629-37.
  13. 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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  14. 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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  15. Boutsen, F, Duffy, JR, Dimassi, H, Christman. Long-term instability in ataxic dysarthria. Folia Phoniatrica et Logopaedica. 2011.
  16. 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.
  17. 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.
  18. 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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  19. 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.
  20. 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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  21. 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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  22. 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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  23. 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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  24. 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.
  25. 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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  26. 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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  27. 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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  28. 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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  29. Duffy JR. Apraxia of speech in degenerative neurologic disease. Aphasiology. 2006 Jun; 20(6):511-27.
  30. 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.
  31. 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.
  32. 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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  33. 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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  34. 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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  35. 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.
  36. 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.
  37. 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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  38. 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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  39. Duffy JR. Managing primary progressive aphasia. (Invited article). National Aphasia Association News Bulletin. 2005 May 2.
  40. 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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  41. 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.
  42. 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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  43. 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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  44. 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.
  45. 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.
  46. 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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  47. 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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  48. 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.
  49. 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.
  50. 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.
  51. 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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  52. 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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  53. 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.
  54. 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.
  55. 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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  56. 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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  57. 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.
  58. 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.
  59. 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.
  60. 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.
  61. 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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  62. Kent RD, Kent JF, Duffy JR, Weismer G, Stuntebeck S. Ataxic dysarthria. Journal of Speech-Language-Hearing Research. 2000;43:1275-89.
  63. 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.
  64. 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.
  65. 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.
  66. 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.
  67. 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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  68. 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.
  69. Kent RD, Duffy JR, Vorperian HK, Thomas JE. Severe essential vocal and oromandibular tremor: A case report. Phonoscope. 1998; 1(4):237-53.
  70. 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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  71. 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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  72. Boutsen FR, Bakker K, Duffy JR. Subgroups in ataxic dysarthria. Journal of Medical Speech-Language Pathology. 1997; 5:27-36.
  73. Baumgartner J, Duffy JR. Psychogenic stuttering in adults with and without neurologic disease. Journal of Medical Speech-Language Pathology. 1997; 5:75-95.
  74. 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.
  75. 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.
  76. Duffy JR. Why differential diagnosis? Special Interest Division 2 Newsletter. 1995; 5:2-6.
  77. Duffy RJ, Watt JH, Duffy JR. Testing causal theories of pantominic deficits in aphasia using path analysis. Aphasiology. 1994 Jul-Aug; 8:361-379.
  78. 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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  79. 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.
  80. Duffy JR. Emerging and future concerns in motor speech disorders. American Journal of Speech-Language Pathology. 1994; 3:36-9.
  81. Duffy JR. Path analysis. Clinical Aphasiology. 1993; 21:47-57.
  82. Duffy JR, Petersen RC. Primary progressive aphasia. Aphasiology. 1992 Jan/Feb; 6:1-15.
  83. 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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  84. 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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  85. 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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