| Autor: |
Kwon, Jeong-Seung, Han, Sang-Ho, Im, Yeong-Gwan |
| Předmět: |
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| Zdroj: |
CRANIO: The Journal of Craniomandibular & Sleep Practice; Nov2024, Vol. 42 Issue 6, p736-744, 9p |
| Abstrakt: |
Objective: To investigate the surface electromyography (EMG) activity of the temporalis, masseter, digastric, and infrahyoid muscles during passive jaw opening in healthy adults. Methods: The EMG activity of the masseter, temporalis, digastric anterior belly, and infrahyoid muscles on the right side was recorded during the four jaw-opening tasks: active opening to 20 mm (AO20); active opening to 40 mm (AO40); passive opening to 40 mm with a rubber mouth prop on the right posterior teeth (POR40); and passive opening to 40 mm with a mouth prop on the left posterior teeth (POL40). Results: The EMG amplitude of the digastric anterior belly and infrahyoid muscles in either POL40 or POR40 was significantly less than that in AO20 or AO40, respectively. Conclusion: Passive jaw opening reduces the EMG activity of the digastric and infrahyoid muscles significantly and could help reduce the load on these muscles during prolonged mouth-opening conditions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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