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How to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery

There is an ongoing debate as to whether singing helps left-hemispheric stroke patients recover from non-fluent aphasia through stimulation of the right hemisphere. According to recent work, it may not be singing itself that aids speech production in non-fluent aphasic patients, but rhythm and lyric...

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Autores principales: Stahl, Benjamin, Henseler, Ilona, Turner, Robert, Geyer, Stefan, Kotz, Sonja A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3583105/
https://www.ncbi.nlm.nih.gov/pubmed/23450277
http://dx.doi.org/10.3389/fnhum.2013.00035
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author Stahl, Benjamin
Henseler, Ilona
Turner, Robert
Geyer, Stefan
Kotz, Sonja A.
author_facet Stahl, Benjamin
Henseler, Ilona
Turner, Robert
Geyer, Stefan
Kotz, Sonja A.
author_sort Stahl, Benjamin
collection PubMed
description There is an ongoing debate as to whether singing helps left-hemispheric stroke patients recover from non-fluent aphasia through stimulation of the right hemisphere. According to recent work, it may not be singing itself that aids speech production in non-fluent aphasic patients, but rhythm and lyric type. However, the long-term effects of melody and rhythm on speech recovery are largely unknown. In the current experiment, we tested 15 patients with chronic non-fluent aphasia who underwent either singing therapy, rhythmic therapy, or standard speech therapy. The experiment controlled for phonatory quality, vocal frequency variability, pitch accuracy, syllable duration, phonetic complexity and other influences, such as the acoustic setting and learning effects induced by the testing itself. The results provide the first evidence that singing and rhythmic speech may be similarly effective in the treatment of non-fluent aphasia. This finding may challenge the view that singing causes a transfer of language function from the left to the right hemisphere. Instead, both singing and rhythmic therapy patients made good progress in the production of common, formulaic phrases—known to be supported by right corticostriatal brain areas. This progress occurred at an early stage of both therapies and was stable over time. Conversely, patients receiving standard therapy made less progress in the production of formulaic phrases. They did, however, improve their production of non-formulaic speech, in contrast to singing and rhythmic therapy patients, who did not. In light of these results, it may be worth considering the combined use of standard therapy and the training of formulaic phrases, whether sung or rhythmically spoken. Standard therapy may engage, in particular, left perilesional brain regions, while training of formulaic phrases may open new ways of tapping into right-hemisphere language resources—even without singing.
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spelling pubmed-35831052013-02-28 How to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery Stahl, Benjamin Henseler, Ilona Turner, Robert Geyer, Stefan Kotz, Sonja A. Front Hum Neurosci Neuroscience There is an ongoing debate as to whether singing helps left-hemispheric stroke patients recover from non-fluent aphasia through stimulation of the right hemisphere. According to recent work, it may not be singing itself that aids speech production in non-fluent aphasic patients, but rhythm and lyric type. However, the long-term effects of melody and rhythm on speech recovery are largely unknown. In the current experiment, we tested 15 patients with chronic non-fluent aphasia who underwent either singing therapy, rhythmic therapy, or standard speech therapy. The experiment controlled for phonatory quality, vocal frequency variability, pitch accuracy, syllable duration, phonetic complexity and other influences, such as the acoustic setting and learning effects induced by the testing itself. The results provide the first evidence that singing and rhythmic speech may be similarly effective in the treatment of non-fluent aphasia. This finding may challenge the view that singing causes a transfer of language function from the left to the right hemisphere. Instead, both singing and rhythmic therapy patients made good progress in the production of common, formulaic phrases—known to be supported by right corticostriatal brain areas. This progress occurred at an early stage of both therapies and was stable over time. Conversely, patients receiving standard therapy made less progress in the production of formulaic phrases. They did, however, improve their production of non-formulaic speech, in contrast to singing and rhythmic therapy patients, who did not. In light of these results, it may be worth considering the combined use of standard therapy and the training of formulaic phrases, whether sung or rhythmically spoken. Standard therapy may engage, in particular, left perilesional brain regions, while training of formulaic phrases may open new ways of tapping into right-hemisphere language resources—even without singing. Frontiers Media S.A. 2013-02-27 /pmc/articles/PMC3583105/ /pubmed/23450277 http://dx.doi.org/10.3389/fnhum.2013.00035 Text en Copyright © 2013 Stahl, Henseler, Turner, Geyer and Kotz. http://creativecommons.org/licenses/by/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.
spellingShingle Neuroscience
Stahl, Benjamin
Henseler, Ilona
Turner, Robert
Geyer, Stefan
Kotz, Sonja A.
How to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery
title How to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery
title_full How to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery
title_fullStr How to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery
title_full_unstemmed How to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery
title_short How to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery
title_sort how to engage the right brain hemisphere in aphasics without even singing: evidence for two paths of speech recovery
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3583105/
https://www.ncbi.nlm.nih.gov/pubmed/23450277
http://dx.doi.org/10.3389/fnhum.2013.00035
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