Temporal overlap between gestures and speech in poststroke aphasia: is there a compensatory effect?

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• dc.contributor.author Zhang, Han
• dc.contributor.author Hinzen, Wolfram
• dc.date.accessioned 2023-05-22T06:19:49Z
• dc.date.issued 2022
• dc.description.abstract Purpose: If language production is impaired, will gestures compensate? Evidence in favor of this prediction has often been argued to come from aphasia, but it remains contested. Here, we tested whether thought content not present in speech due to language impairment is manifested in gestures, in 20 people with dysfluent (Broca’s) aphasia, 20 people with fluent (Wernicke’s) aphasia, and 20 matched neurotypical controls. Method: A new annotation scheme was created distinguishing types of gestures and whether they co-occurred with fluent or dysfluent/absent speech and were temporally aligned in content with coproduced speech. Results: Across both aphasia types, noncontent (beat) gestures, which by their nature cannot compensate for lost speech content, constituted the greatest proportion of all types of gestures produced. Content (i.e., descriptive, referential, and metaphorical) gestures were largely coproduced with fluent rather than dysfluent speech and tended to be aligned with the content conveyed in speech. They also did not differ in quantity depending on whether the dysfluencies were eventually resolved or not. Neither aphasia severity nor comprehension ability had an impact on the total amount of content gesture produced in people with aphasia, which was instead positively correlated with speech fluency. Conclusions: Together, these results suggest that gestures are unlikely to have a role in compensating for linguistic deficits and to serve as a representational system conveying thought content independent of language. Surprisingly, aphasia rather is a model of how gesture and language are inherently integrated and aligned: Even when language is impaired, it remains the essential provider of content.
• dc.description.sponsorship This work was supported by the Ministerio de Ciencia, Innovación y Universidades and the Agencia Estatal de Investigación (https://www.aei.gob.es/) under Grant PID2019-105241GB-I00/AEI/10.13039/501100011033 to W.H., and by the Generalitat de Catalunya (Agència de Gestió d’Ajuts Universitaris i de Recerca) and the European Social Found (https://agaur.gencat.cat/en/inici/) under Grant 2021 FI_B 00166 to H.Z.
• dc.format.mimetype application/pdf
• dc.identifier.citation Zhang H, Hinzen W. Temporal overlap between gestures and speech in poststroke aphasia: is there a compensatory effect?. J Speech Lang Hear Res. 2022;65(12):4797-811. DOI: 10.1044/2022_JSLHR-22-00130
• dc.identifier.doi http://dx.doi.org/10.1044/2022_JSLHR-22-00130
• dc.identifier.issn 1092-4388
• dc.identifier.uri http://hdl.handle.net/10230/56914
• dc.language.iso eng
• dc.publisher American Speech-Language-Hearing Association
• dc.relation.ispartof Journal of Speech, Language & Hearing Research. 2022;65(12):4797-811.
• dc.relation.isreferencedby https://aphasia.talkbank.org/
• dc.relation.projectID info:eu-repo/grantAgreement/ES/2PE/PID2019-105241GB-I00
• dc.rights © American Speech-Language-Hearing Association. http://dx.doi.org/10.1044/2022_JSLHR-22-00130
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.subject.other Afàsia
• dc.subject.other Gest
• dc.subject.other Parla
• dc.title Temporal overlap between gestures and speech in poststroke aphasia: is there a compensatory effect?
• dc.type info:eu-repo/semantics/article
• dc.type.version info:eu-repo/semantics/acceptedVersion