Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-28T11:06:21.791Z Has data issue: false hasContentIssue false

LANGUAGE AND PARKINSON'S DISEASE

Published online by Cambridge University Press:  01 March 2008

Abstract

Parkinson's disease, the most common progressive neurological movement disorder worldwide, causes slow deterioration of subcortical structures and dopamine deficiency, and the disruption of circuits connecting frontal lobe and basal ganglia regions. Although the motor and cognitive consequences of these structural and physiological changes have been well-documented, only a limited, albeit growing, empirical literature has examined the integrity of language abilities in individuals with Parkinson's disease. This article reviews recent advances in that literature that have furthered our understanding of the quantitative and qualitative changes in morphosyntactic, lexical-semantic, and discourse levels of language functioning associated with Parkinson's disease. This article also discusses the theoretical and applied implications of these linguistic symptoms and provides suggestions to forward this line of research.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

ANNOTATED REFERENCES

Berg, E., Bjornram, C., Hartelius, L., Laakso, K., & Jonels, B. (2003). High-level language difficulties in Parkinson's disease. Clinical Linguistics and Phonetics, 17 (1), 6380.Google Scholar
Friederici, A. D., Kotz, S. A., Werheid, K., Hein, G., & von Cramon, D. (2003). Syntactic comprehension in Parkinson's disease: Investigating early automatic and late integrational processes using event-related brain potentials. Neuropsychology, 17, 133142.CrossRefGoogle ScholarPubMed
Grossman, M., Cooke, A., DeVita, C., Lee, C., Alsop, D., Detre, J., et al. (2003). Grammatical and resource components of sentence processing in Parkinson's disease: An fMRI study. Neurology, 60, 775781.Google Scholar
Murray, L. L. (2000). Spoken language production in Huntington's and Parkinson's diseases. Journal of Speech, Language, and Hearing Research, 43, 13501366.CrossRefGoogle ScholarPubMed
Angwin, A. J., Chenery, H. J., Copland, D. A., Murdoch, B. E., & Silburn, P. A. (2004). The time course of semantic activation in Parkinson's disease. Brain and Language, 91, 145146.Google Scholar
Angwin, A. J., Chenery, H. J., Copland, D. A., Murdoch, B. E., & Silburn, P. A. (2006). Self-paced reading and sentence comprehension in Parkinson's disease. Journal of Neurolinguistics, 19 (3), 239252.CrossRefGoogle Scholar
Angwin, A. J., Copland, D. A., Silburn, P. A., Chenery, H. J., & Murdoch, B. E. (2006). The influence of dopamine on semantic activation in Parkinson's disease: Evidence from a multipriming task. Neuropsychology, 20 (3), 299306.CrossRefGoogle ScholarPubMed
Arnott, W. L., Chenery, H. J., Murdoch, B. E., & Silburn, P. A. (2005). Morphosyntactic and syntactic priming: An investigation of underlying processing mechanisms and the effects of Parkinson's disease. Journal of Neurolinguistics, 18 (1), 128.CrossRefGoogle Scholar
Bayles, K. A., Tomeoda, C. K., Wood, J. A., Cruz, R., Azuma, T., & Montgomery, E. (1997). The effect of Parkinson's disease on language. Journal of Medical Speech-Language Pathology, 5 (3), 157166.Google Scholar
Boulenger, V., Mechtouff, L., Thobois, S., Broussolle, E., Jeannerod, M., & Nazir, T. A. (2008). Word processing in Parkinson's disease is impaired for action verbs but not for concrete nouns. Neuropsychologia, 46 (2), 743756.CrossRefGoogle Scholar
Caballo, N., Marti, M. J., & Tolosa, E. (2007). Cognitive dysfunction and dementia in Parkinson disease. Movement Disorders, 22 (Suppl. 17), S358S366.Google Scholar
Cameli, L., Phillips, N. A., Kousaie, S., & Panisset, M. (2006). Memory and language in bilingual Alzheimer and Parkinson patients: Insights from verb inflection. Brain and Cognition, 60, 304323.Google Scholar
Carne, W., Cifu, D., Marcinko, P., Baron, M., Pickett, T., Qutubuddin, A., et al. (2005). Efficacy of multidisciplinary treatment program on long-term outcomes of individuals with Parkinson's disease. Journal of Rehabilitation Research and Development, 42 (6), 779786.CrossRefGoogle ScholarPubMed
Castner, J. E., Chenery, H., Copland, D., Coyne, T., Sinclair, F., & Silburn, P. (2007). Semantic and affective priming as a function of stimulation of the subthalamic nucleus in Parkinson's disease. Brain, 130, 13951407.CrossRefGoogle ScholarPubMed
Colman, K., Koerts, J., van Beilen, M., Leenders, K. L., & Bastiaanse, R. (2006). The role of cognitive mechanisms in sentence comprehension in Dutch speaking Parkinson's disease patients: Preliminary data. Brain and Language, 99, 120121.Google Scholar
Copland, D.A., Chenery, H. J., & Murdoch, B.E. (2001). Discourse priming of homophones in individuals with dominant nonthalamic subcortical lesions, cortical lesions, and Parkinson's disease. Journal of Clinical and Experimental Neuropsychology, 23 (4), 538556.Google Scholar
Copland, D. (2003). The basal ganglia and semantic engagement: Potential insights from semantic priming in individuals with subcortical vascular lesions, Parkinson's disease, and cortical lesions. Journal of the International Neuropsychological Society, 9, 10411052.CrossRefGoogle ScholarPubMed
Cotelli, M., Borroni, B., Manenti, R., Zanetti, M., Arevalo, A., Cappa, S. F., et al. (2007). Action and object naming in Parkinson's disease without dementia. European Journal of Neurology, 14, 632637.Google Scholar
Coyne, T., Silburn, P., Cook, R., Silberstein, P., Mellick, G., Sinclair, F., et al. (2006). Rapid subthalamic nucleus deep brain stimulation lead placement utilizing CT/MRI fusion, microelectrode recording and test stimulation. Acta Neurochirurgica Supplementum, 99, 4950.CrossRefGoogle ScholarPubMed
Cummings, J. L., Darkins, A., Mendez, M., Hill, M. A., & Benson, D. F. (1988). Alzheimer's disease and Parkinson's disease: Comparison of speech and language alterations. Neurology, 38, 680684.Google Scholar
DeLong, M. R. (2000). The basal ganglia. In Kandel, E. R., Schwartz, J. H., & Jessell, T. M. (Eds.), Principles of neural science (4th ed., pp. 853867). New York: McGraw-Hill.Google Scholar
Demakis, G. L., Mercury, M., Sweet, J., Rezak, M., Eller, T., & Vergenz, S. (2003). Qualitative analysis of verbal fluency before and after unilateral pallidotomy. Clinical Neuropsychologist, 17 (3), 322330.CrossRefGoogle ScholarPubMed
Ellis, C., & Rosenbek, J. C. (2007). The basal ganglia and expressive language: A review and directions for research. Communicative Disorders Review, 1 (1), 115.Google Scholar
Henry, J. D., & Crawford, J. R. (2004). Verbal fluency deficits in Parkinson's disease: A meta-analysis. Journal of the International Neuropsychological Society, 10, 608623.Google Scholar
Hochstadt, J., Nakano, H., Lieberman, P., & Friedman, J. (2006). The roles of sequencing and verbal working memory in sentence comprehension deficits in Parkinson's disease. Brain and Language, 97, 243257.Google Scholar
Horstink, M., Tolosa, E., Bonuccelli, U., Deuschl, G., Friedman, A., Kanovsky, P., et al. (2006). Review of the therapeutic management of Parkinson's disease. Report of a joint task force of the European Federation of Neurological Societies and the Movement Disorder Society-European Section. Part 1: Early (uncomplicated) Parkinson's disease. European Journal of Neurology, 13, 11701185.Google Scholar
Hough, M. S. (2004). Generative word fluency skills in adults with Parkinson's disease. Aphasiology, 18 (5–7), 581588.CrossRefGoogle Scholar
Kintsch, W., & van Dijk, T. A. (1978). Toward a model of text comprehension and production. Psychological Review, 85, 363394.Google Scholar
Longworth, C. E., Keenan, S. E., Barker, R. A., Marslen-Wilson, W. D., & Tyler, L. K. (2005). The basal ganglia and rule-governed language use: Evidence from vascular and degenerative conditions. Brain, 128, 584596.Google Scholar
Magee, W. L., Brumfitt, S. M., Freeman, M., & Davidson, J. W. (2006). The role of music therapy in an interdisciplinary approach to address functional communication in complex neuro-communication disorders: A case report. Disability and Rehabilitation, 28 (19), 12211229.Google Scholar
Mattay, V. S., Tessitore, A., Callicott, J. H., Bertolino, A., Goldberg, T. E., Chase, T. N., et al. (2002). Dopaminergic modulation of cortical function in patients with Parkinson's disease. Annals of Neurology, 51 (2), 156164.Google Scholar
McNamara, P., & Durso, R. (2003). Pragmatic communication skills in patients with Parkinson's disease. Brain and Language, 84, 414423.Google Scholar
McNamara, P., Krueger, M., O'Quin, K., Clark, J., & Durso, R. (1996). Grammaticality judgments and sentence comprehension in Parkinson's disease: A comparison with Broca's aphasia. International Journal of Neuroscience, 86 (1–2), 151166.CrossRefGoogle ScholarPubMed
Miller, N., Noble, E., Jones, D., & Burn, D. (2006). Life with communication changes in Parkinson's disease. Age and Ageing, 35 (3), 235239.CrossRefGoogle ScholarPubMed
Monetta, L., & Pell, M. D. (2007). Effects of verbal working memory deficits on metaphor comprehension in patients with Parkinson's’ disease. Brain and Language, 101, 8089.CrossRefGoogle ScholarPubMed
Murray, L. L., & Clark, H. M. (2006). Neurogenic disorders of language: Theory driven clinical practice. Clifton Park, NY: Thomson Delmar Learning.Google Scholar
Murray, L. L., & Lenz, L. P. (2001). Productive syntax abilities in Huntington's and Parkinson's diseases. Brain and Cognition, 46, 213219.Google Scholar
Murray, L. L., & Stout, J. C. (1999). Discourse comprehension in Huntington's and Parkinson's diseases. American Journal of Speech-Language Pathology, 8, 137148.Google Scholar
Pignatti, R., Ceriani, F., Bertella, L., Mori, I., & Semenza, C. (2006). Naming abilities in spontaneous speech in Parkinson's and Alzheimer's disease. Brain and Language, 99, 124125.CrossRefGoogle Scholar
Rothlind, J., Cockshott, R., Starr, P., & Marks, W. (2007). Neuropsychological performance following staged bilateral pallidal or subthalamic nucleus deep brain stimulation for Parkinson's disease. Journal of the International Neuropsychological Society, 13, 6879.CrossRefGoogle ScholarPubMed
Samii, A., Nutt, J. G., & Ransom, B. R. (2004). Parkinson's disease. Lancet, 363 (9423), 17831793.Google Scholar
Sapir, S., Spielman, J. L., Ramig, L. O., Story, B. H., & Fox, C. (2007). Effects of intensive voice treatment (the Lee Silverman Voice Treatment [LSVT]) on vowel articulation in dysarthric individuals with idiopathic Parkinson disease: Acoustic and perceptual findings. Journal of Speech, Language, and Hearing Research, 50 (4), 899912.Google Scholar
Shapiro, K. A., Mottaghy, F. M., Schiller, N. O., Poeppel, T. D., Flub, M. O., & Müller, H. W. (2005). Dissociating neural correlates for nouns and verbs. NeuroImage, 24, 10581067.CrossRefGoogle ScholarPubMed
Skeel, R. L., Crosson, B., Nadeau, S. E., Algina, J., Bauer, R. M., & Fennell, E. B. (2001). Basal ganglia dysfunction, working memory, and sentence comprehension in patients with Parkinson's disease. Neuropsychologia, 39 (9), 962971.Google Scholar
Spielman, J., Ramig, L. O., Mahler, L., Halpern, A., & Gavin, W. J. (2007). Effects of an extended version of the Lee Silverman Voice Treatment on voice and speech in Parkinson's disease. American Journal of Speech-Language Pathology, 16 (2), 95107.Google Scholar
Terzi, A., Papapetropoulos, S., & Kouvelas, E. D. (2005). Past tense formation and comprehension of passive sentences in Parkinson's disease: Evidence from Greek. Brain and Language, 94 (3), 297303.Google Scholar
Troster, A. I., Woods, S. P., & Fields, J. A. (2003). Verbal fluency declines after pallidotomy: An interaction between task and lesion laterality. Applied Neuropsychology, 10 (2), 6975.CrossRefGoogle ScholarPubMed
Wade, D. T., Gage, H., Owen, C., Trend, P., Grossmith, C., & Kaye, J. (2003). Multidisciplinary rehabilitation for people with Parkinson's disease: A randomized controlled study. Journal of Neurology, Neurosurgery and Psychiatry, 74 (2), 158162.Google Scholar
Whiting, E., Copland, D., & Angwin, A. (2005). Verb and context processing in Parkinson's disease. Journal of Neurolinguistics, 18 (3), 259276.CrossRefGoogle Scholar
York, M. K., Levin, H. S., Grossman, R. G., Lai, E., & Krauss, J. (2003). Clustering and switching in phonemic fluency following pallidotomy for the treatment of Parkinson's disease. Journal of Clinical and Experimental Neuropsychology, 25, 110121.CrossRefGoogle ScholarPubMed
Zanini, S., Melatini, A., Capus, L., Gioulis, M., Vassallo, A., & Bava, A. (2003). Language recovery following subthalamic nucleus stimulation in Parkinson's disease. NeuroReport, 14 (3), 511516.Google Scholar
Zanini, S., Tavano, A., Vorano, L., Schiavo, F., Gigli, G., Aglioti, S. M., et al. (2004). Greater syntactic impairments in native language in bilingual Parkinsonian patients. Journal of Neurology, Neurosurgery and Psychiatry, 75, 16781681.Google Scholar
Zgaljardic, D. J., Borod, J. C., Foldi, N. S., Mattis, P. J. Gordon, M. F., & Feigin, A. (2006). An examination of executive dysfunction associated with frontostriatal circuitry in Parkinson's disease. Journal of Clinical and Experimental Neuropsychology, 28, 11271144.Google Scholar
Angwin, A. J., Chenery, H. J., Copland, D. A., Murdoch, B. E., & Silburn, P. A. (2004). The time course of semantic activation in Parkinson's disease. Brain and Language, 91, 145146.Google Scholar
Angwin, A. J., Chenery, H. J., Copland, D. A., Murdoch, B. E., & Silburn, P. A. (2006). Self-paced reading and sentence comprehension in Parkinson's disease. Journal of Neurolinguistics, 19 (3), 239252.CrossRefGoogle Scholar
Angwin, A. J., Copland, D. A., Silburn, P. A., Chenery, H. J., & Murdoch, B. E. (2006). The influence of dopamine on semantic activation in Parkinson's disease: Evidence from a multipriming task. Neuropsychology, 20 (3), 299306.CrossRefGoogle ScholarPubMed
Arnott, W. L., Chenery, H. J., Murdoch, B. E., & Silburn, P. A. (2005). Morphosyntactic and syntactic priming: An investigation of underlying processing mechanisms and the effects of Parkinson's disease. Journal of Neurolinguistics, 18 (1), 128.CrossRefGoogle Scholar
Bayles, K. A., Tomeoda, C. K., Wood, J. A., Cruz, R., Azuma, T., & Montgomery, E. (1997). The effect of Parkinson's disease on language. Journal of Medical Speech-Language Pathology, 5 (3), 157166.Google Scholar
Boulenger, V., Mechtouff, L., Thobois, S., Broussolle, E., Jeannerod, M., & Nazir, T. A. (2008). Word processing in Parkinson's disease is impaired for action verbs but not for concrete nouns. Neuropsychologia, 46 (2), 743756.CrossRefGoogle Scholar
Caballo, N., Marti, M. J., & Tolosa, E. (2007). Cognitive dysfunction and dementia in Parkinson disease. Movement Disorders, 22 (Suppl. 17), S358S366.Google Scholar
Cameli, L., Phillips, N. A., Kousaie, S., & Panisset, M. (2006). Memory and language in bilingual Alzheimer and Parkinson patients: Insights from verb inflection. Brain and Cognition, 60, 304323.Google Scholar
Carne, W., Cifu, D., Marcinko, P., Baron, M., Pickett, T., Qutubuddin, A., et al. (2005). Efficacy of multidisciplinary treatment program on long-term outcomes of individuals with Parkinson's disease. Journal of Rehabilitation Research and Development, 42 (6), 779786.CrossRefGoogle ScholarPubMed
Castner, J. E., Chenery, H., Copland, D., Coyne, T., Sinclair, F., & Silburn, P. (2007). Semantic and affective priming as a function of stimulation of the subthalamic nucleus in Parkinson's disease. Brain, 130, 13951407.CrossRefGoogle ScholarPubMed
Colman, K., Koerts, J., van Beilen, M., Leenders, K. L., & Bastiaanse, R. (2006). The role of cognitive mechanisms in sentence comprehension in Dutch speaking Parkinson's disease patients: Preliminary data. Brain and Language, 99, 120121.Google Scholar
Copland, D.A., Chenery, H. J., & Murdoch, B.E. (2001). Discourse priming of homophones in individuals with dominant nonthalamic subcortical lesions, cortical lesions, and Parkinson's disease. Journal of Clinical and Experimental Neuropsychology, 23 (4), 538556.Google Scholar
Copland, D. (2003). The basal ganglia and semantic engagement: Potential insights from semantic priming in individuals with subcortical vascular lesions, Parkinson's disease, and cortical lesions. Journal of the International Neuropsychological Society, 9, 10411052.CrossRefGoogle ScholarPubMed
Cotelli, M., Borroni, B., Manenti, R., Zanetti, M., Arevalo, A., Cappa, S. F., et al. (2007). Action and object naming in Parkinson's disease without dementia. European Journal of Neurology, 14, 632637.Google Scholar
Coyne, T., Silburn, P., Cook, R., Silberstein, P., Mellick, G., Sinclair, F., et al. (2006). Rapid subthalamic nucleus deep brain stimulation lead placement utilizing CT/MRI fusion, microelectrode recording and test stimulation. Acta Neurochirurgica Supplementum, 99, 4950.CrossRefGoogle ScholarPubMed
Cummings, J. L., Darkins, A., Mendez, M., Hill, M. A., & Benson, D. F. (1988). Alzheimer's disease and Parkinson's disease: Comparison of speech and language alterations. Neurology, 38, 680684.Google Scholar
DeLong, M. R. (2000). The basal ganglia. In Kandel, E. R., Schwartz, J. H., & Jessell, T. M. (Eds.), Principles of neural science (4th ed., pp. 853867). New York: McGraw-Hill.Google Scholar
Demakis, G. L., Mercury, M., Sweet, J., Rezak, M., Eller, T., & Vergenz, S. (2003). Qualitative analysis of verbal fluency before and after unilateral pallidotomy. Clinical Neuropsychologist, 17 (3), 322330.CrossRefGoogle ScholarPubMed
Ellis, C., & Rosenbek, J. C. (2007). The basal ganglia and expressive language: A review and directions for research. Communicative Disorders Review, 1 (1), 115.Google Scholar
Henry, J. D., & Crawford, J. R. (2004). Verbal fluency deficits in Parkinson's disease: A meta-analysis. Journal of the International Neuropsychological Society, 10, 608623.Google Scholar
Hochstadt, J., Nakano, H., Lieberman, P., & Friedman, J. (2006). The roles of sequencing and verbal working memory in sentence comprehension deficits in Parkinson's disease. Brain and Language, 97, 243257.Google Scholar
Horstink, M., Tolosa, E., Bonuccelli, U., Deuschl, G., Friedman, A., Kanovsky, P., et al. (2006). Review of the therapeutic management of Parkinson's disease. Report of a joint task force of the European Federation of Neurological Societies and the Movement Disorder Society-European Section. Part 1: Early (uncomplicated) Parkinson's disease. European Journal of Neurology, 13, 11701185.Google Scholar
Hough, M. S. (2004). Generative word fluency skills in adults with Parkinson's disease. Aphasiology, 18 (5–7), 581588.CrossRefGoogle Scholar
Kintsch, W., & van Dijk, T. A. (1978). Toward a model of text comprehension and production. Psychological Review, 85, 363394.Google Scholar
Longworth, C. E., Keenan, S. E., Barker, R. A., Marslen-Wilson, W. D., & Tyler, L. K. (2005). The basal ganglia and rule-governed language use: Evidence from vascular and degenerative conditions. Brain, 128, 584596.Google Scholar
Magee, W. L., Brumfitt, S. M., Freeman, M., & Davidson, J. W. (2006). The role of music therapy in an interdisciplinary approach to address functional communication in complex neuro-communication disorders: A case report. Disability and Rehabilitation, 28 (19), 12211229.Google Scholar
Mattay, V. S., Tessitore, A., Callicott, J. H., Bertolino, A., Goldberg, T. E., Chase, T. N., et al. (2002). Dopaminergic modulation of cortical function in patients with Parkinson's disease. Annals of Neurology, 51 (2), 156164.Google Scholar
McNamara, P., & Durso, R. (2003). Pragmatic communication skills in patients with Parkinson's disease. Brain and Language, 84, 414423.Google Scholar
McNamara, P., Krueger, M., O'Quin, K., Clark, J., & Durso, R. (1996). Grammaticality judgments and sentence comprehension in Parkinson's disease: A comparison with Broca's aphasia. International Journal of Neuroscience, 86 (1–2), 151166.CrossRefGoogle ScholarPubMed
Miller, N., Noble, E., Jones, D., & Burn, D. (2006). Life with communication changes in Parkinson's disease. Age and Ageing, 35 (3), 235239.CrossRefGoogle ScholarPubMed
Monetta, L., & Pell, M. D. (2007). Effects of verbal working memory deficits on metaphor comprehension in patients with Parkinson's’ disease. Brain and Language, 101, 8089.CrossRefGoogle ScholarPubMed
Murray, L. L., & Clark, H. M. (2006). Neurogenic disorders of language: Theory driven clinical practice. Clifton Park, NY: Thomson Delmar Learning.Google Scholar
Murray, L. L., & Lenz, L. P. (2001). Productive syntax abilities in Huntington's and Parkinson's diseases. Brain and Cognition, 46, 213219.Google Scholar
Murray, L. L., & Stout, J. C. (1999). Discourse comprehension in Huntington's and Parkinson's diseases. American Journal of Speech-Language Pathology, 8, 137148.Google Scholar
Pignatti, R., Ceriani, F., Bertella, L., Mori, I., & Semenza, C. (2006). Naming abilities in spontaneous speech in Parkinson's and Alzheimer's disease. Brain and Language, 99, 124125.CrossRefGoogle Scholar
Rothlind, J., Cockshott, R., Starr, P., & Marks, W. (2007). Neuropsychological performance following staged bilateral pallidal or subthalamic nucleus deep brain stimulation for Parkinson's disease. Journal of the International Neuropsychological Society, 13, 6879.CrossRefGoogle ScholarPubMed
Samii, A., Nutt, J. G., & Ransom, B. R. (2004). Parkinson's disease. Lancet, 363 (9423), 17831793.Google Scholar
Sapir, S., Spielman, J. L., Ramig, L. O., Story, B. H., & Fox, C. (2007). Effects of intensive voice treatment (the Lee Silverman Voice Treatment [LSVT]) on vowel articulation in dysarthric individuals with idiopathic Parkinson disease: Acoustic and perceptual findings. Journal of Speech, Language, and Hearing Research, 50 (4), 899912.Google Scholar
Shapiro, K. A., Mottaghy, F. M., Schiller, N. O., Poeppel, T. D., Flub, M. O., & Müller, H. W. (2005). Dissociating neural correlates for nouns and verbs. NeuroImage, 24, 10581067.CrossRefGoogle ScholarPubMed
Skeel, R. L., Crosson, B., Nadeau, S. E., Algina, J., Bauer, R. M., & Fennell, E. B. (2001). Basal ganglia dysfunction, working memory, and sentence comprehension in patients with Parkinson's disease. Neuropsychologia, 39 (9), 962971.Google Scholar
Spielman, J., Ramig, L. O., Mahler, L., Halpern, A., & Gavin, W. J. (2007). Effects of an extended version of the Lee Silverman Voice Treatment on voice and speech in Parkinson's disease. American Journal of Speech-Language Pathology, 16 (2), 95107.Google Scholar
Terzi, A., Papapetropoulos, S., & Kouvelas, E. D. (2005). Past tense formation and comprehension of passive sentences in Parkinson's disease: Evidence from Greek. Brain and Language, 94 (3), 297303.Google Scholar
Troster, A. I., Woods, S. P., & Fields, J. A. (2003). Verbal fluency declines after pallidotomy: An interaction between task and lesion laterality. Applied Neuropsychology, 10 (2), 6975.CrossRefGoogle ScholarPubMed
Wade, D. T., Gage, H., Owen, C., Trend, P., Grossmith, C., & Kaye, J. (2003). Multidisciplinary rehabilitation for people with Parkinson's disease: A randomized controlled study. Journal of Neurology, Neurosurgery and Psychiatry, 74 (2), 158162.Google Scholar
Whiting, E., Copland, D., & Angwin, A. (2005). Verb and context processing in Parkinson's disease. Journal of Neurolinguistics, 18 (3), 259276.CrossRefGoogle Scholar
York, M. K., Levin, H. S., Grossman, R. G., Lai, E., & Krauss, J. (2003). Clustering and switching in phonemic fluency following pallidotomy for the treatment of Parkinson's disease. Journal of Clinical and Experimental Neuropsychology, 25, 110121.CrossRefGoogle ScholarPubMed
Zanini, S., Melatini, A., Capus, L., Gioulis, M., Vassallo, A., & Bava, A. (2003). Language recovery following subthalamic nucleus stimulation in Parkinson's disease. NeuroReport, 14 (3), 511516.Google Scholar
Zanini, S., Tavano, A., Vorano, L., Schiavo, F., Gigli, G., Aglioti, S. M., et al. (2004). Greater syntactic impairments in native language in bilingual Parkinsonian patients. Journal of Neurology, Neurosurgery and Psychiatry, 75, 16781681.Google Scholar
Zgaljardic, D. J., Borod, J. C., Foldi, N. S., Mattis, P. J. Gordon, M. F., & Feigin, A. (2006). An examination of executive dysfunction associated with frontostriatal circuitry in Parkinson's disease. Journal of Clinical and Experimental Neuropsychology, 28, 11271144.Google Scholar