Lesion-aphasia discordance in acute stroke among Bengali-speaking patients: Frequency, pattern, and effect on aphasia recovery

Lahiri, Durjoy; Dubey, Souvik; Ardila, Alfredo; Sawale, Vishal Madhukar; Das, Gautam; Ray, Biman Kanti

doi:10.1016/j.jneuroling.2019.100859

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…Bengali is the national language of Bangladesh (first language of 142 million speakers, 98.8% of the total population, Bangladesh Census, 2011) and the official language of three states of India—West Bengal, Tripura, and Assam (first language of 97 million speakers, 8.3% of the total population, India Census, 2011). Despite the large number of Bengali speakers, only a handful of studies have reported on epidemiological aspects of aphasia research in Bengali speakers, rather than linguistic investigation per se [ 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Lexical and Cognitive Underpinnings of Verbal Fluency: Evidence from Bengali-English Bilingual Aphasia

Patra

Bose

Marinis

2020

Behavioral Sciences

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Research in bilingual healthy controls (BHC) has illustrated that detailed characterization of verbal fluency along with separate measures of executive control stand to inform our understanding of the lexical and cognitive underpinnings of the task. Such data are currently lacking in bilinguals with aphasia (BWA). We aimed to compare the characteristics of verbal fluency performance (semantic, letter) in Bengali–English BWA and BHC, in terms of cross-linguistic differences, variation on the parameters of bilingualism, and cognitive underpinnings. BWA showed significant differences on verbal fluency variables where executive control demands were higher (fluency difference score, number of switches, between-cluster pauses); whilst performed similarly on variables where executive control demands were lower (cluster size, within-cluster pauses). Despite clear cross-linguistic advantage in Bengali for BHC, no cross-linguistic differences were noted in BWA. BWA who were most affected in the independent executive control measures also showed greater impairment in letter fluency condition. Correlation analyses revealed a significant relationship for BWA between inhibitory control and number of correct responses, initial retrieval time, and number of switches. This research contributes to the debate of underlying mechanisms of word retrieval deficits in aphasia, and adds to the nascent literature of BWA in South Asian languages.

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Section: Introductionmentioning

confidence: 99%

Lexical and Cognitive Underpinnings of Verbal Fluency: Evidence from Bengali-English Bilingual Aphasia

Patra

Bose

Marinis

2020

Behavioral Sciences

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“…Approval from the Institutional Ethics Committee was obtained before beginning the study. The general results of Kolkata Aphasia Study are presented in several papers (Lahiri et al, 2019a(Lahiri et al, , 2019b(Lahiri et al, , 2019c(Lahiri et al, , 2020…”

Section: The Kolkata Aphasia Studymentioning

confidence: 99%

Aphasia in Bilinguals

Ardila

Lahiri

2020

Preprint

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Background:Little is known about the influence of bilingualism in aphasia. Aims:To analyze the effect of bilingualism in a group of patients with aphasia.Methods: Data from155 monolingual and 53 bilingual aphasia patients were analyzed.Results: It was found that aphasia was significantly less severe in bilinguals when compared to monolinguals (p=0.023) Conclusion: Bilingualism represents a protecting factor in aphasia. Aphasia is less severe and consequently, recovery is expected to be better in bilingual patients.

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“…Bengali is currently ranked as the seventh most spoken language in the world; more than 265 million people speak Bengali as their first or second language in their everyday life. Despite the large number of Bengali speakers there are only handful of studies involving Bengali speakers with neurological impairments (e.g., Lahiri et al, 2019 ; Patra et al, 2020 ), and remains one of the under-represented and under-explored world languages in neurological research (Beveridge and Bak, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Connected Speech Characteristics of Bengali Speakers With Alzheimer's Disease: Evidence for Language-Specific Diagnostic Markers

Bose

Dash

Ahmed

et al. 2021

Front. Aging Neurosci.

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Background and aim: Speech and language characteristics of connected speech provide a valuable tool for identifying, diagnosing and monitoring progression in Alzheimer's Disease (AD). Our knowledge of linguistic features of connected speech in AD is primarily derived from English speakers; very little is known regarding patterns of linguistic deficits in speakers of other languages, such as Bengali. Bengali is a highly inflected pro-drop language from the Indo-Aryan language family. It is the seventh most spoken language in the world, yet to date, no studies have investigated the profile of linguistic impairments in Bengali speakers with AD. The aim of this study was to characterize connected speech production and identify the linguistic features affected in Bengali speakers with AD.Methods: Participants were six Bengali speaking AD patients and eight matched controls from the urban metropolis, Kolkata, India. Narrative samples were elicited in Bengali using the Frog Story. Samples were analyzed using the Quantitative Production Analysis and the Correct Information Unit analyses to quantify six different aspects of speech production: speech rate, structural and syntactic measures, lexical measures, morphological and inflectional measures, semantic measures and measure of spontaneity and fluency disruptions.Results and conclusions: In line with the extant literature from English speakers, the Bengali AD participants demonstrated decreased speech rate, simplicity of sentence forms and structures, and reduced semantic content. Critically, differences with English speakers' literature emerged in the domains of Bengali specific linguistic features, such as the pro-drop nature of Bengali and its inflectional properties of nominal and verbal systems. Bengali AD participants produced fewer pronouns, which is in direct contrast with the overuse of pronouns by English AD participants. No obvious difficulty in producing nominal and verbal inflections was evident. However, differences in the type of noun inflections were evident; these were characterized by simpler inflectional features used by AD speakers. This study represents the first of its kind to characterize connected speech production in Bengali AD participants and is a significant step forward toward the development of language-specific clinical markers in AD. It also provides a framework for cross-linguistic comparisons across structurally distinct and under-explored languages.

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Lesion-aphasia discordance in acute stroke among Bengali-speaking patients: Frequency, pattern, and effect on aphasia recovery

Cited by 7 publications

References 33 publications

Lexical and Cognitive Underpinnings of Verbal Fluency: Evidence from Bengali-English Bilingual Aphasia

Lexical and Cognitive Underpinnings of Verbal Fluency: Evidence from Bengali-English Bilingual Aphasia

Aphasia in Bilinguals

Connected Speech Characteristics of Bengali Speakers With Alzheimer's Disease: Evidence for Language-Specific Diagnostic Markers

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