Robustness of lateral tongue bracing under bite block perturbation
| Autor: | Yadong Liu, Sophia Luo, Monika Łuszczuk, Connor Mayer, Arian Shamei, Gillian de Boer, Bryan Gick |
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| Rok vydání: | 2022 |
| Předmět: |
Speech-Language Pathology & Audiology
Linguistics and Language Acoustics and Ultrasonics Palate Posture Psychology and Cognitive Sciences Article Language and Linguistics Tongue Speech Production Measurement speech postures Humans Speech bite block perturbation lateral tongue bracing Dental/Oral and Craniofacial Disease Communication and Culture Language |
| Zdroj: | Phonetica Phonetica, vol 79, iss 6 |
| ISSN: | 1423-0321 0031-8388 |
| DOI: | 10.1515/phon-2022-0001 |
| Popis: | Lateral tongue bracing is a lingual posture in which the sides of the tongue are held against the palate and upper molars, and has been observed cross-linguistically. However, it is unknown whether lateral bracing makes adjustments to external perturbation like other body postures. The present study aims to test the robustness of lateral tongue bracing with three experiments. The first baseline experiment was an analysis of an electropalatogram database and the results showed lateral bracing being continuously maintained. The second experiment applied an external perturbation during speech production. A bite block was held between participants’ teeth while intra-oral video was used to record contact between the sides of the tongue and upper molars during speech. The results indicated that lateral bracing was maintained most of the time during speech. The third experiment included simulations investigating the activation of tongue muscles relevant to lateral bracing at different degrees of jaw opening. The results show that bracing requires higher activation of bracing agonists and lower activation of bracing antagonists as jaw opening increases. Our results suggest that lateral tongue bracing is actively maintained and robust under external perturbation and further indicate it serves as an essential lingual posture during speech production. |
| Databáze: | OpenAIRE |
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