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Maria Kambanaros - One of the best experts on this subject based on the ideXlab platform.
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Lexical retrieval deficits in Anomic Aphasia and specific language impairment (SLI): More similar than different? Grammatical class and context effects
Linguistic Variation, 2013Co-Authors: Maria Kambanaros, Willem Van SteenbruggeAbstract:Lexical retrieval of verbs and nouns was compared in two groups of impaired language users, children diagnosed with SLI and adults with acquired Anomic Aphasia, on two production tasks: picture confrontation naming and connected speech. Both children with SLI and adults with Anomic Aphasia showed a more substantial lexical or naming deficit for verbs than for nouns. However, no specific verb retrieval deficit was observed in connected speech in either group. Furthermore, partial correlations between verb and noun naming and their type-token ratios in connected speech failed to find an association between verb/ noun retrieval in naming and in connected speech. The results suggest (1) that children with SLI and adults with Anomic Aphasia show a specific verb deficit in naming, and (2) that the ability to predict lexical retrieval abilities for verbs (and nouns) in connected speech from naming performance is weak for both groups.
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Group effects of instrumentality and name relation on action naming in bilingual Anomic Aphasia
Brain and language, 2009Co-Authors: Maria KambanarosAbstract:Verb production in sentences was investigated in two groups of late bilingual Greek-English speakers: individuals with Anomic Aphasia and a control group. Verb retrieval in sentences was significantly impaired in both languages for the individuals with Anomic Aphasia. Additional results revealed no effect of instrumentality on action naming in sentences in either language. However, there was a negative effect of verb-noun name relation on instrumental verb production in English only. Results confirm intact verb lemma retrieval for this group of bilingual individuals with Anomic Aphasia, but a breakdown at the level of accessing the phonological or lexical form.
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The effect of instrumentality and verb-noun name relation on verb retrieval in bilingual Greek-English Anomic aphasic individuals
2007Co-Authors: Maria KambanarosAbstract:The effect of instrumentality and verb-noun name relation has been studied in a group of late bilingual, Greek-English speaking individuals with Anomic Aphasia, who had previously shown a greater verb than noun impairment in a picture naming task. The results revealed a facilitatory effect of instrumentality in both languages. However, there was no effect of verb-noun name relation in Greek, and a negative effect of verb-noun name relation was observed in English. The findings showed that lemma retrieval was intact in this group of bilingual individuals whose main problem seemed to arise during the retrieval of the phonological representation of the target word.
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The trouble with nouns and verbs in Greek fluent Aphasia.
Journal of communication disorders, 2007Co-Authors: Maria KambanarosAbstract:Abstract In the past verb retrieval problems were associated primarily with agrammatism and noun retrieval difficulties with fluent Aphasia. With regards to fluent Aphasia, so far in the literature, three distinct patterns of verb/noun dissociations have been described for individuals with fluent Anomic Aphasia in languages with different underlying forms; better verb retrieval, poorer verb retrieval and equal retrieval difficulties for verbs and nouns. Verbs and nouns in Greek are considered of similar morphological complexity thus it was predicted that Anomic aphasic individuals would suffer from a non-dissociated impairment of verbs and nouns. Problems with verbs and/or nouns may arise at any stage in the process of lexical retrieval, i.e. lexical-semantic, lemma, lexeme or articulation. The aim of this research was to investigate verb and noun retrieval using a picture-naming task to explore any possible selective noun and/or verb comprehension or retrieval deficits in Greek individuals with Anomic Aphasia. The results revealed a significant verb/noun dichotomy with verbs significantly more difficult to retrieve than nouns. These findings lend support for the growing body of evidence showing a specific verb impairment in fluent Anomic individuals as well as Broca's patients. Given the prevailing view, that Anomic patients experience difficulty retrieving the morpho-phonological form of the target word, the results show that specific information of the grammatical category is also important during word form retrieval. Learner outcomes: The reader will become familiar with (i) studies investigating grammatical word class breakdown in individuals with Aphasia who speak different languages, (ii) the application of the serial model to word production breakdown in Aphasia and (iii) the characteristics of verbs and nouns in Greek. It will be concluded that successful verb retrieval for fluent aphasic individuals who speak Greek is dependant on the retrieval of the morpho-phonological information of the target verb.
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Noun and verb processing in Greek-English bilingual individuals with Anomic Aphasia and the effect of instrumentality and verb-noun name relation.
Brain and language, 2005Co-Authors: Maria Kambanaros, Willem Van SteenbruggeAbstract:Noun and verb comprehension and production was investigated in two groups of late bilingual, Greek-English speakers: individuals with Anomic Aphasia and a control group of non-brain injured individuals matched for age and gender. There were no significant differences in verb or noun comprehension between the two groups in either language. However, verb and noun production during picture naming was significantly worse in the bilingual individuals with Anomic Aphasia in both languages, who also showed a specific verb impairment in Greek and English. The potential underlying level of breakdown of the specific verb impairment was further investigation with reference to two specific features of verbs: instrumentality and verb-noun relationship. Additional results revealed a facilitatory effect of Instrumentality in both languages. However, there was no effect of verb-noun name relation in Greek, and a negative effect of verb-noun name relation was observed in English. Lemma retrieval seemed to be intact in this group of bilingual individuals whose main problem seemed to arise during the retrieval of the phonological representation of the target word. This impairment was greater in English. The findings are discussed in terms of three current models of word production.
Shum, Wai-man Waisa - One of the best experts on this subject based on the ideXlab platform.
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Measuring the coherence of normal and aphasic discourse production in Chinese using rhetorical structure theory (RST)
The University of Hong Kong (Pokfulam Hong Kong), 2014Co-Authors: Shum, Wai-man WaisaAbstract:The study investigated the difference in discourse coherence between healthy speakers and speakers with Anomic Aphasia using Rhetorical Structure Theory (RST). The effect of genre types on coherence and potential factors contributing to the differences were also examined. Fifteen native Cantonese participants of Anomic Aphasia and their control matched in age, education and gender participated. Sixty language samples were obtained using the story-telling and sequential description tasks of the Cantonese AphasiaBank protocol. Twenty naïve listeners provided subjective ratings on the coherence, completeness, correctness of order, and clarity of each speech sample. Results demonstrated that the control group showed significantly higher production fluency, total number of discourse units, and fewer errors than the Aphasia group. Controls used a richer set of relations than the aphasic group, particularly those to describe settings, to express causality, and to elaborate. The aphasic group tended to omit more essential information content and was rated with significantly lower coherence and clarity than controls. The findings suggested that speakers with Anomic Aphasia had reduced proportion of essential information content, lower degree of elaboration, and more structural disruptions than the controls, which may have contributed to the reduced overall discourse coherence.published_or_final_versionSpeech and Hearing SciencesBachelorBachelor of Science in Speech and Hearing Science
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Measuring the coherence of healthy and aphasic discourse production in Chinese using Rhetorical Structure Theory (RST)
Frontiers in Psychology, 2014Co-Authors: Kong Anthony Pak Hin, Linnik Anastasia, Sampo, Shum, Wai-man WaisaAbstract:Introduction Discourse coherence refers to the semantic connectedness of propositions in a connected speech. Various theoretical bases, narrative elicitation tasks, and sample quantifications as well as small sample sizes in most studies resulted in a substantial disparity in findings regarding the micro-linguistic and macro-linguistic aspects of aphasic discourse (Armstrong, 2000). Specifically, while some reports claimed macro-linguistic skills in Aphasia to be well-preserved despite lexical, grammatical, and phonological impairments, other studies demonstrated reduced discourse coherence due to omission of important content and higher proportion of irrelevant propositions. In this study we analyzed the discourse structure in aphasic connected speech using Rhetorical Structure Theory (RST; Mann & Thompson, 1988). RST analyzes text organization by describing the semantic relations that hold between units of a text. The present study investigated how discourse coherence in healthy speakers differed from speakers with Anomic Aphasia. Potential factors contributing to these differences were also examined. Method Fifteen Cantonese-speaking adults with Anomic Aphasia and their controls matched in age, education, and gender participated. Sixty language samples were obtained using the story-telling and sequential description tasks of the Cantonese AphasiaBank protocol. Each sample was segmented into elementary discourse units (EDU) and annotated according to RST. The annotations were analyzed in terms of 12 parameters measuring the depth, structural disruption, and expansion of discourse structure. Twenty naïve listeners participated in a perception experiment, where they were asked to provide subjective ratings of the coherence, completeness, correctness of order, and clarity of each speech sample. Results The non-brain-damaged group demonstrated significantly higher production fluency, total number of EDUs, size of relation set, and fewer errors (semantic, phonemic parAphasia, morphological errors, and neologisms) than the Aphasia group. Analysis of semantic relations employed revealed that controls used a richer set of relations than subjects with Aphasia, particularly those to describe settings, to express causality, and to elaborate. More reformulations, corrections, false starts, and retracing were found in aphasic discourse. The aphasic group also tended to have a higher degree of omission of essential information content and was rated by naïve listeners with significantly lower coherence and clarity than controls. An effect of genre was found where both speaker groups had a faster EDU production and greater variety of relations used in their story-telling than sequential description. Unexpectedly, speakers with Aphasia produced more EDU, with a greater depth of discourse structure, in the sequential description task. Conclusion Our results seemed to suggest that speakers with Anomic Aphasia had reduced proportion of essential information content, lower degree of elaboration, simplified discourse structure, and more structural disruptions than their healthy counterparts. We argue that the above characteristics have contributed to the reduced overall coherence in their oral discourse. The use of RST to quantify discourse coherence provided more objective measurement on macro-linguistic characteristics in Aphasia and, therefore, warrants further investigation
H Tanaka - One of the best experts on this subject based on the ideXlab platform.
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Postencephalitic pure Anomic Aphasia: 2-year follow-up.
Journal of the neurological sciences, 2001Co-Authors: B Okuda, K Kawabata, H Tachibana, M Sugita, H TanakaAbstract:We report a patient with pure Anomic Aphasia following encephalitis. Brain magnetic resonance imaging (MRI) revealed bilateral temporal lesions, and subsequent focal atrophy in the left anterior inferior temporal lobe. Over the course of a 2-year follow-up, the patient's naming difficulty persisted without other dysfunction of language or memory. These observations indicate a contribution of the left anterior inferior temporal region to object naming.
Yasuhiro Ito - One of the best experts on this subject based on the ideXlab platform.
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Neuroradiologic and clinical abnormalities in dementia of diffuse neurofibrillary tangles with calcification (Kosaka-Shibayama disease).
Journal of the neurological sciences, 2003Co-Authors: Yasuhiro Ito, Takashi Kato, Tomomi Suzuki, Yuki Yokokawa, Ikuko Aiba, Yutaka Arahata, Eiichi Ito, Kengo Ito, Takeshi Yasuda, Gen SobueAbstract:We describe a characteristic dementia patient diagnosed as diffuse neurofibrillary tangles with calcification (DNTC). Neuropsychologically, dementia, including a decline in memory retention and intelligence, and Anomic Aphasia were recognized. Imaging revealed circumscribed temporal dominant atrophy and calcification of the basal ganglia and cerebellum. SPECT and FDG-PET revealed a remarkable reduction of blood flow and metabolism in the temporal lobes; however, there is no reduction in the basal ganglia and cerebellum, and FDOPA-PET also disclosed no abnormalities. This suggests that calcification and neuronal degeneration occur independently in DNTC.
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Neuroradiologic and clinical abnormalities in dementia of diffuse neurofibrillary tangles with calcification (Kosaka–Shibayama disease)
Journal of the Neurological Sciences, 2003Co-Authors: Yasuhiro Ito, Takashi Kato, Tomomi Suzuki, Yuki Yokokawa, Ikuko Aiba, Yutaka Arahata, Eiichi Ito, Kengo Ito, Takeshi Yasuda, SobueAbstract:We describe a characteristic dementia patient diagnosed as diffuse neurofibrillary tangles with calcification (DNTC). Neuropsychologically, dementia, including a decline in memory retention and intelligence, and Anomic Aphasia were recognized. Imaging revealed circumscribed temporal dominant atrophy and calcification of the basal ganglia and cerebellum. SPECT and FDG-PET revealed a remarkable reduction of blood flow and metabolism in the temporal lobes; however, there is no reduction in the basal ganglia and cerebellum, and FDOPA-PET also disclosed no abnormalities. This suggests that calcification and neuronal degeneration occur independently in DNTC.
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Short communication Neuroradiologic and clinical abnormalities in dementia of diffuse neurofibrillary tangles with calcification (Kosaka-Shibayama disease)
2003Co-Authors: Yasuhiro Ito, Takashi Kato, Tomomi Suzuki, Yuki Yokokawa, Ikuko Aiba, Yutaka Arahata, Eiichi Ito, Kengo Ito, Takeshi Yasuda, SobueAbstract:We describe a characteristic dementia patient diagnosed as diffuse neurofibrillary tangles with calcification (DNTC). Neuropsychologically, dementia, including a decline in memory retention and intelligence, and Anomic Aphasia were recognized. Imaging revealed circumscribed temporal dominant atrophy and calcification of the basal ganglia and cerebellum. SPECTand FDG-PET revealed a remarkable reduction of blood flow and metabolism in the temporal lobes; however, there is no reduction in the basal ganglia and cerebellum, and FDOPA-PET also disclosed no abnormalities. This suggests that calcification and neuronal degeneration occur independently in DNTC. D 2003 Elsevier Science B.V. All rights reserved.
Pelagie M Beeson - One of the best experts on this subject based on the ideXlab platform.
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Treatment for lexical retrieval in progressive Aphasia
Aphasiology, 2008Co-Authors: Maya L. Henry, Pelagie M Beeson, Stephen Z. RapcsakAbstract:Background: Treatment for lexical retrieval impairment has been shown to yield positive outcomes in individuals with Aphasia due to focal lesions, but there has been little research regarding the treatment of such impairments in individuals with progressive Aphasia. Aims: The purpose of this study was to examine the therapeutic effects of a semantic treatment for anomia in progressive Aphasia relative to the outcome in an individual with stroke‐induced Aphasia. Methods & Procedures: Two individuals with progressive Aphasia and one with Aphasia resulting from stroke participated in the study. Each participant presented with fluent, Anomic Aphasia; however, one of the patients with progressive Aphasia demonstrated characteristics indicating a likely progression towards non‐fluency. Each participant received a brief, intensive treatment intended to improve lexical retrieval in the context of generative naming for selected semantic categories. Treatment tasks included guided lexical retrieval prompted by the ...
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acquired alexia lessons from successful treatment
Journal of The International Neuropsychological Society, 1998Co-Authors: Pelagie M Beeson, Deborah InsalacoAbstract:Two individuals with Anomic Aphasia and acquired alexia were each provided treatment for their reading impairment. Although reading of single words in isolation was fairly accurate, their text reading was slow and effortful, including functor substitutions and semantic errors. Prior to treatment, reading reaction times for single words showed grammatical class and word-length effects. Both patients responded positively to a treatment protocol that included two phases: (1) multiple oral rereading of text, and (2) reading phrase-formatted text that had increased spacing between phrasal clauses. Their reading rates for text improved while maintaining good comprehension. Following treatment, reading reaction times for single words showed the elimination of grammatical class and word-length effects, suggesting improved access to word forms, particularly functors. ( JINS , 1998, 4 , 621–635.)
