Word Processing Deficits in Persons with Right Hemisphere Damage: Evidence from in-Depth Analyses of Verbal Fluency Tasks
DOI:
https://doi.org/10.12970/2311-1917.2018.06.02Keywords:
Right hemisphere, word retrieval, lexico-semantic deficit, verbal fluency, cluster, switch, time course analysis.Abstract
The role of the right hemisphere (RH) in word processing continues to interest the neuroscientists. Occasional explorations of the word retrieval functions of the RH with verbal fluency tasks have shown poor performance in persons with right hemisphere damage (RHD). However, there are differing views on the mechanism underlying the poor performance in this population. Some investigations attribute the deficient performance on verbal fluency task to the lexico-semantic deficits, whereas, others ascribe it to deficient cognitive agility. To illustrate these differing views, we performed in-depth analyses of (i.e., accuracy scores, clusters, switches, & time course of word retrieval) a group of 22 participants with RHD on eight semantic and three phoneme fluency tasks. Comparisons with the neuro-typical participants yielded evidence in favor of the linguistic rather than cognitive deficits as the mechanism behind poor word retrieval skills in persons with RHD.
References
Krishnan G, Rajashekar B, Karanth P. Lexico-semantic deficits in persons with right hemisphere damage: evidence from convergent naming tasks. J Neurolinguist 2015; 35: 13- 24. https://doi.org/10.1016/j.jneuroling.2015.01.002
Gainotti G, Caltagirone C, Miceli G, Masullo C. Selective semantic-lexical impairment of language comprehension in right-brain-damaged patients. Brain Lang 1981; 13: 201-211. https://doi.org/10.1016/0093-934X(81)90090-0
Joanette Y, Lecours AR, Lamoureux M. Language in right handers with right-hemisphere lesions: a preliminary study including anatomical, genetic, and social factors. Brain Lang 1983; 20: 217-248. https://doi.org/10.1016/0093-934X(83)90043-3
Varley R. Lexical-semantic deficits following right hemisphere damage: evidences from verbal fluency tasks. Eur J Disord Commun 1995; 30: 362-371. https://doi.org/10.3109/13682829509021448
Gazzaniga MS, Bogen JE, Sperry RW. Some functional effects of sectioning the cerebral commissures. Proc Natl Acad Sci USA 1962; 48: 1765-1769. https://doi.org/10.1073/pnas.48.10.1765
Varley R. Diectic terms, lexical retrieval and utterance length in aphasia. Eur J Disord Commun 1993; 30: 23-41. https://doi.org/10.3109/13682829309033141
Zaidel E. Auditory vocabulary of the right hemisphere following brain bisection or hemidecortication. Cortex 1976; 12: 191-211. https://doi.org/10.1016/S0010-9452(76)80001-9
Fedio P, August A, Patronas N, Sato S, Kufta C. Semantic, phonological, and perceptual changes following left and right intracarotid injection (Wada) with a low amytal dosage. Brain Cognit 1997; 33: 98-117. https://doi.org/10.1006/brcg.1997.0886
Hier DB, Kaplan J. Verbal comprehension deficits after right hemisphere damage. Appl Psycholinguist 1980; 1: 279-294. https://doi.org/10.1017/S0142716400000564
Rivers DL, Love RJ. Language performance on visual processing tasks in right hemisphere lesion cases. Brain Lang 1980; 10: 348-356. https://doi.org/10.1016/0093-934X(80)90061-9
Khatoonabadi AR, Hovsepian A, Harley T, Kahlaoui K, Masolais Y, Joanette Y. The impact of left- and right hemisphere on the processing of concrete and abstract words in Farsi. Brain Cognit 2008; 67: S11-S47. https://doi.org/10.1016/j.bandc.2008.02.048
Kaplan E, Goodglass H, Weintraub S. Boston Naming Test. Philadelphia: Lee & Febiger 1983.
Henry JD, Crawford JR, Phillips LH. Verbal fluency performance in dementia of the Alzheimer's type: a meta analysis. Neuropsychologia 2004; 42(9): 1212-1222. https://doi.org/10.1016/j.neuropsychologia.2004.02.001
Kertesz A. Western Aphasia Battery. San Antonio, TX: The Psychological Corporation 1982.
Mioshi E, Dawson K, Mitchell J, Arnold R, Hodges JR. The Addenbrooke's Cognitive Examination Revised (ACE-R): a brief cognitive test battery for dementia screening. Int J Geriat Psychiat 2006; 21: 1078-1085. https://doi.org/10.1002/gps.1610
Troyer AK, Moscovitch M, Winocur G. Clustering and switching as two components of verbal fluency: evidence from younger and older healthy adults. Neuropsychology 1997; 11(1): 138-146. https://doi.org/10.1037/0894-4105.11.1.138
Hough MS, Pabst MJ, DeMarco S. Categorization skills in right hemisphere brain damage for common and goal-derived categories. Clin Aphasiol 1994; 22: 35-51.
Joanette Y, Goulet P. Criterion-specific reduction of verbal fluency in right brain-damaged right-handers. Neuropsychologia 1986; 24(6): 875-879. https://doi.org/10.1016/0028-3932(86)90087-4
Joanette Y, Goulet P, Le Dorze G. Impaired word naming in right-brain-damaged right-handers: error types and time course analyses. Brain Lang 1988; 34(1): 54-64. https://doi.org/10.1016/0093-934X(88)90124-1
Albert ML, Sandson J. Perseveration in aphasia. Cortex 1986; 22: 103-115. https://doi.org/10.1016/S0010-9452(86)80035-1
Lokesh B, Krishnan G. Adaptation and standardization of Addenbrooke's Cognitive Examination to Kannada. Manipal University, Manipal 2008.
Tombaugh TN, Kozak J, Rees L. Normative data stratified by age and education for two measures of verbal fluency: FAS and animal naming. Archiv Clin Neuropsychol 1999; 14: 167- 177.
Wixted JT, Rohrer D. Analyzing the dynamics of free recall: an integrative review of the empirical literature. Psychonom Bull Rev 1994; 1: 89-106. https://doi.org/10.3758/BF03200763
Villardita C. Verbal memory and semantic clustering in right brain-damaged patients. Neuropsychologia 1987; 25: 277- 280. https://doi.org/10.1016/0028-3932(87)90138-2
