Comparison of semantic and phonemic Clustering and switching in Parkinson`s disease and normal subjects
Background and Aim: Impairment in language content production, long-term memory and executive function in Parkinson's disease reported in several studies. Identification of these disorders is useful in planning for early interventions. The aim of this study was evaluation of semantic and phonemic clustering and switching in Parkinson's disease.
Methods: In this study, 30 patients with Parkinson's disease and 30 healthy individuals evaluated that were matched by age, sex and educational level. Clustering and switching average were compared between the two groups according to the Troyer method. Data recorded and analyzed using independent t test and Pearson correlation coefficient.
Results: Comparison of mean scores of clustering between patients with Parkinson's disease and healthy individuals indicated significant difference (p=0.05). In addition, significant difference was observed between mean score of switching in two groups (p=0.008).
Conclusion: The finding of the present study reveal that switching between semantic or phonemic subcategory and clustering impaired in patients with Parkinson's disease.
2. Emre M, Aarsland D, Brown R, Burn DJ, Duyckaerts C, Mizuno Y, et al. Clinical diagnostic criteria for dementia associated with Parkinson`s disease. Mor Disord. 2007;22(12):1689-707.
3. Bublak P, Muller U, Gron G, Reuter M, Cramon DY. Manipulation of working memory information is impaired in Parkinson`s disease and related to working memory capacity. Neuropsychology. 2002;16(4):577-90.
4. Chapey R. Language intervention strategies in aphasia and related neurogenic communication disorders. 4th ed. New York: Lippincott Williams & Wilkins; 2001.
5. Ruff RM, Light RH, Parker SB, Levin HS. The psychological construct of word fluency. Brain Lang. 1997;57(3):394-405.
6. Troyer AK, Moscovtich M, Vinocour G. Clusterirng and switching as two components of verbal fluency: evidence from younger and older healthy adults. Neuropsycholgy. 1997(11):138-46.
7. Raskin SA, Sliwinski M, Bbrorod JG. Clustring strategies on task of verbal fluency in Parkinson`s disease. Neuropschologia. 1992;30(1):90-5.
8. Troyer AK, Moscovitch M, Winocur G, Alexander MP, Stuss D. Clustering and switching on verbal fluency: the effects of focal frontal- and temporal- lobe lesions. Neuropsychologia. 1998;36(6):499-504.
9. Troster AL, Fields JA, Testa JA, Paul RH, Blanco CR, Hames KA, et al. Cortical and subcortical influences on clustering and switching in the performance of verbal fluency tasks. Neuropsychologia. 1998;36(4):295-304.
10. Donovan K, Siegert R, Mcdowall J, Abernethy D. Clustering and switching in verbal fluency in Parkinson`s disease. NZJ Psicholy. 1999;28(1):1065-104.
11. Hirshorn EA, Thempson schill SL. Role of the left inferior frontal gyrus in covert word retrieval: neural correlates of switching during verbal fluency. Neuropsychologia. 2006;44(12):2547-57.
12. Levy G, Jacobs DM, Tang MX, Côté LJ, Louis ED, Alfaro B, et al. Memory and executive function impairment predict dementia in Parkinson’s disease. Mov Disord. 2002;17(6):1221-6.
13. Weintraub D, Moberg PJ, Culbertson WC, Duda JE, Katz IR, Stern MB. Dimensions of executive function in Parkinson’s disease. Dement Geriatr Cogn Disord. 2005;20(2-3):140-44.
14. Auriacombe S, Grossman M, Carvell S, Gollomp S, Stern M, Hurtig HI. Verbal fluency deficits in Parkinson disease. Neuropsychology. 1993;7:182-92.
15. Mathuranath PS, George AP, Cherian PJ, Alexander A, Sarma SG, Sarma PS. Effects of age, education and gender on verbal fluency. J Clin Exp Neuropsychol. 2003;25(8):1057-64.
|Issue||Vol 23 No 2 (2014)|
|Clustering switching semantic phonological verbal fluency Parkinson’s disease|
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