Temporal Overlap between Gestures and Speech in Poststroke Aphasia: Is There a Compensatory Effect?

Autor/inn/en	Zhang, Han; Hinzen, Wolfram
Titel	Temporal Overlap between Gestures and Speech in Poststroke Aphasia: Is There a Compensatory Effect?
Quelle	In: Journal of Speech, Language, and Hearing Research, 65 (2022) 12, S.4797-4811 (15 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Zhang, Han)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Neurological Impairments; Nonverbal Communication; Aphasia; Speech Communication; Language Impairments; Interpersonal Communication; English; Adults + Suchen Sie Ihr Suchwort? Neurodegenerative Erkrankung; Non-verbal communication; Nonverbale Kommunikation; Expressive Aphasie; Aphasie; Speech disorder; Speech disorders; Speech disabilities; Speech disability; Speech handicap; Speech handicaps; Speech impairment; Speech impairments; Language handicaps; Sprachbehinderung; Interpersonale Kommunikation; English language; Englisch
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. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01