Department of Dentistry, National Yang Ming Chiao Tung University, Taiwan; Institute of Brain Science, National Yang Ming Chiao Tung University, Taiwan; Brain Research Center, National Yang Ming Chiao Tung University, Taiwan; Oral Medicine Innovation Center, National Yang Ming Chiao Tung University, Taiwan.
Department of Dentistry, National Yang Ming Chiao Tung University, Taiwan.
Arch Oral Biol. 2024 May;161:105914. doi: 10.1016/j.archoralbio.2024.105914. Epub 2024 Feb 17.
Mastication can be influenced by intraoral perturbation (e.g., hard food). We developed the masticatory perturbation task (MPT) to assess the perturbation effect during mastication and quantify the degree of adaptation to masticatory perturbation in younger and older adults.
Thirty-eight younger and 38 older participants completed the MPT, which consisted of three trials assessing masticatory performance (MP) without perturbation (i.e., the baseline condition) and three trials assessing MP with perturbation (i.e., the perturbation condition). Perturbation was implemented by concurrently chewing test food on the preferred side and a drinking straw on the nonpreferred side. We estimated the perturbation effect as the ΔMP between the baseline and perturbation conditions and the adaptation effect as the ΔMP between the third and the first trials for both age groups.
We found a significant perturbation effect, i.e., a lower MP in the perturbation condition than in the baseline condition, and an adaptation effect, i.e., a higher MP in the third trial than the first trial, in both groups. Moreover, the older group showed a lower degree of adaptation than the younger group.
The masticatory perturbation task revealed the perturbation effect during mastication and the adaptation to masticatory perturbation. The results revealed an association between age and masticatory adaptation.
咀嚼可受到口内扰动（例如硬食物）的影响。我们开发了咀嚼扰动任务（MPT），以评估咀嚼过程中的扰动效应，并量化年轻人和老年人对咀嚼扰动的适应程度。
38 名年轻人和 38 名老年人参与者完成了 MPT，该任务包括三个试验，分别评估无扰动（即基线条件）和有扰动（即扰动条件）下的咀嚼表现（MP）。扰动通过同时在偏好侧咀嚼测试食物和在非偏好侧咀嚼吸管来实现。我们将扰动效应估计为基线和扰动条件之间的 ΔMP，将适应效应估计为两个年龄组的第三和第一试验之间的 ΔMP。
我们发现，在两个组中都存在显著的扰动效应，即在扰动条件下的 MP 低于基线条件下的 MP，以及适应效应，即在第三试验中的 MP 高于第一试验中的 MP。此外，老年人组的适应程度低于年轻人组。
咀嚼扰动任务揭示了咀嚼过程中的扰动效应和对咀嚼扰动的适应。结果表明，年龄与咀嚼适应之间存在关联。
