Influence of chewing force on salivary stress markers as indicator of mental stress
Influence of chewing force on salivary stress markers as indicator of mental stress
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DOI：
10.1111/j.1365-2842.2011.02264.x
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发表时间：
2012-04-01
影响因子：
2.9
通讯作者：
Sakurai, K.
中科院分区：
文献类型：
--
作者：
Soeda, R.;Tasaka, A.;Sakurai, K.
本研究的目的是探讨咀嚼力对唾液应激标志物（α-淀粉酶活性，唾液皮质醇水平和分泌型免疫球蛋白A分泌率）的影响，作为精神应激的指标。参与者包括20名健康男性。第一组唾液样本（S1）在休息20分钟后立即收集，以评估应激标志物。作为压力负荷，要求参与者进行20分钟的算术计算，之后收集第二组唾液样本（S2）。然后要求每个参与者咀嚼一块无味的口香糖10分钟，之后收集第三组唾液样本（S3）。静置20分钟后，收集第四组唾液样本（S4）。分配了弱、习惯性和强咀嚼力。计算S2与S3、S2与S4应激指标的变化率。皮质醇水平的变化率在S2和S3之间观察到显著差异。强咀嚼时皮质醇水平下降幅度大于弱咀嚼时。3种咀嚼力对淀粉酶活性变化率和s-IgA分泌率的影响差异无统计学意义。结果表明，咀嚼力的差异影响唾液皮质醇水平的三个压力标志物，和一个强大的咀嚼力诱导更大的减少精神压力比弱。
The aim of this study was to investigate the influence of chewing force on salivary stress markers (alpha-amylase activity, salivary cortisol level and secretory immunoglobulin A secretion rate) as indicators of mental stress. Participants comprised 20 healthy men. The first set of saliva specimens (S1) was collected at immediately after a 20-min rest to evaluate stress markers. As stress loading, the participants were required to perform arithmetic calculations for 20 min, after which the second set of saliva specimens (S2) was collected. Each participant was then required to chew a piece of tasteless gum for 10 min, after which the third set of saliva specimens (S3) was collected. After a 20-min rest, the fourth set of saliva specimens (S4) was collected. Weak, habitual and strong chewing forces were assigned. Change rates of stress markers between S2 and S3, and S2 and S4 were calculated. A significant difference was observed in the change rate of cortisol levels between S2 and S3. Cortisol level decreased more under strong chewing than under weak chewing. No significant differences were observed in the change rate of amylase activity or s-IgA secretion rate among the three chewing forces. The results suggest that differences in chewing force influence the salivary cortisol level of the three stress markers, and that a strong chewing force induces a greater reduction in mental stress than a weak one.