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| Name | Class |
|---|---|
| Insel Gruppe AG, University Hospital Bern | OTHER |
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The purpose of this study is to investigate the effects of repetitive transcranial magnetic stimulation (rTMS) over the dorsolateral prefrontal cortex (DLPFC) on language production.
Background:
Several studies investigating healthy or clinical populations have shown that (r)TMS applied over the dorsolateral prefrontal cortex (DLPFC) has an effect on language-related processes such as verbal working memory (Osaka et al., 2007), sentence comprehension (Cotelli et al., 2011) and language switching (Holtzheimer et al., 2005, Nardone et al., 2011).
Clinical observations and neuroimaging studies seem to confirm the role of executive functions and frontal structures in language processing in monolingual and bilingual subjects (e.g. Fabbro et al., 2000, Abutalebi & Green 2007). However, only few studies investigated the effects of modulation of cognitive control-networks on lexical access.
Aim and procedure:
The study will investigate the role of the DLPFC and executive functioning in L1 and L2 language processing. The core question is whether rTMS over the DLPFC will influence lexical access and language production.
Each participant will take part in two sessions: 1. rTMS session 2. Sham rTMS session. After the application of rTMS/Sham rTMS, the participants will conduct two language tasks (translation, picture naming) and a non-verbal task, while the EEG is recorded.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| rTMS | Experimental |
| |
| Sham rTMS | Sham Comparator |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| rTMS | Device | repetitive TMS (rTMS) can lead to temporary increases or decreases (depending on the protocol used) in excitability of the targeted area. This change in excitability has been shown to last beyond the duration of the stimulation. |
| Measure | Description | Time Frame |
|---|---|---|
| Language production | Picture naming task and word translation task | within 30 mins after rTMS/sham rTMS |
| Measure | Description | Time Frame |
|---|---|---|
| non-verbal executive functions task | within 30 mins after rTMS/sham rTMS |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Jean-Marie Annoni, Prof. Dr. | University of Fribourg | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Laboratory for Cognitive and Neurological Sciences | Fribourg | 1700 | Switzerland |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 17467169 | Background | Osaka N, Otsuka Y, Hirose N, Ikeda T, Mima T, Fukuyama H, Osaka M. Transcranial magnetic stimulation (TMS) applied to left dorsolateral prefrontal cortex disrupts verbal working memory performance in humans. Neurosci Lett. 2007 May 18;418(3):232-5. doi: 10.1016/j.neulet.2007.01.087. Epub 2007 Apr 8. | |
| 20574108 | Background |
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| ID | Term |
|---|---|
| D007802 | Language |
| ID | Term |
|---|---|
| D003142 | Communication |
| D001519 | Behavior |
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| Sham rTMS | Device | Sham rTMS (or placebo rTMS) refers to a control condition in which no physiological effect on the targeted cortical region occurs. |
|
| Cotelli M, Calabria M, Manenti R, Rosini S, Zanetti O, Cappa SF, Miniussi C. Improved language performance in Alzheimer disease following brain stimulation. J Neurol Neurosurg Psychiatry. 2011 Jul;82(7):794-7. doi: 10.1136/jnnp.2009.197848. Epub 2010 Jun 23. |
| 16098377 | Background | Holtzheimer P, Fawaz W, Wilson C, Avery D. Repetitive transcranial magnetic stimulation may induce language switching in bilingual patients. Brain Lang. 2005 Sep;94(3):274-7. doi: 10.1016/j.bandl.2005.01.003. |
| 21036201 | Background | Nardone R, De Blasi P, Bergmann J, Caleri F, Tezzon F, Ladurner G, Golaszewski S, Trinka E. Theta burst stimulation of dorsolateral prefrontal cortex modulates pathological language switching: A case report. Neurosci Lett. 2011 Jan 10;487(3):378-82. doi: 10.1016/j.neulet.2010.10.060. Epub 2010 Oct 29. |
| 10766900 | Background | Fabbro F, Skrap M, Aglioti S. Pathological switching between languages after frontal lesions in a bilingual patient. J Neurol Neurosurg Psychiatry. 2000 May;68(5):650-2. doi: 10.1136/jnnp.68.5.650. |
| Background | Abutalebi J, Green D. Bilingual language production: The neurocognition of language representation and control. Journal of Neurolinguistics, 20, 242-275, 2007. |