Fine motor control of the jaw following alteration of orofacial afferent inputs
Fine motor control of the jaw following alteration of orofacial afferent inputs
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DOI：
10.1007/s00784-016-1939-4
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发表时间：
2017-03-01
影响因子：
3.4
通讯作者：
Svensson, Peter
中科院分区：
文献类型：
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作者：
Kumar, Abhishek;Castrillon, Eduardo;Svensson, Peter
该研究旨在调查不同的口面传入输入的改变是否会对口腔精细运动控制产生不同的影响，并检验传入输入减少会增加咬合力值和下颌肌肉活动的变异性的假设，在传入输入减少的条件下，重复训练食物碎片的分裂将降低变异性，并导致咬合力值和颌骨的优化。45名健康志愿者参加了一次实验，并被平均分为切口麻醉组、粘膜麻醉组和阻滞麻醉组。参与者进行了六个系列（10次试验）的标准化保持和分割任务后，在各自的组进行局部麻醉干预。结果表明：与对照组相比，切开阻滞麻醉组的保持力和咬肌肌电活动均显著增加（P <0.001），而切开阻滞麻醉组的保持力和咬肌肌电活动均显著增加（P < 0.001）。然而，粘膜麻醉组的分离力没有显著影响（P = 0.975），但与参考组相比，粘膜麻醉组的右咬肌肌电活动显著降低（P = 0.006）。结果还表明，局部麻醉对把持力和劈分力的变异性无显著影响（P < 0.677）。然而，与对照组相比，阻滞麻醉组的下颌闭合肌的EMG活动的变异性显著降低（P < 0.041），在保持阶段，粘膜麻醉组的右咬肌肌电活动的变异性显著增加（P = 0.021）与对照组相比，切口麻醉组的前颞肌肌电活动沿着显著增加本研究的结果表明，改变不同的口面传入输入可能会对口腔精细运动控制的某些方面产生不同的影响。此外，从orofacial或牙周mechanoreceptors传入输入抑制没有增加咬合力值和下颌肌肉活动的变异性，表明口腔精细运动任务的相对精度不受影响，尽管麻醉。研究结果还表明，由于反复分裂的食物块的咬合力值和颌骨肌肉活动的优化的倾向，尽管改变的感官input.Skill收购口腔感觉环境的变化是至关重要的，了解人类如何学习和重新学习口腔运动行为和成功的口腔康复程序后发生的适应。
The study was designed to investigate if alteration of different orofacial afferent inputs would have different effects on oral fine motor control and to test the hypothesis that reduced afferent inputs will increase the variability of bite force values and jaw muscle activity, and repeated training with splitting of food morsel in conditions with reduced afferent inputs would decrease the variability and lead to optimization of bite force values and jaw muscle activity.Forty-five healthy volunteers participated in a single experimental session and were equally divided into incisal, mucosal, and block anesthesia groups. The participants performed six series (with ten trials) of a standardized hold and split task after the intervention with local anesthesia was made in the respective groups. The hold and split forces along with the corresponding jaw muscle activity were recorded and compared to a reference group.The hold force and the electromyographic (EMG) activity of the masseter muscles during the hold phase were significantly higher in the incisal and block anesthesia group, as compared to the reference group (P < 0.001). However, there was no significant effect of groups on the split force (P = 0.975) but a significant decrease in the EMG activity of right masseter in mucosal anesthesia group as compared to the reference group (P = 0.006). The results also revealed that there was no significant effect of local anesthesia on the variability of the hold and split force (P < 0.677). However, there was a significant decrease in the variability of EMG activity of the jaw closing muscles in the block anesthesia group as compared to the reference group (P < 0.041), during the hold phase and a significant increase in the variability of EMG activity of right masseter in the mucosal anesthesia group (P = 0.021) along with a significant increase in the EMG activity of anterior temporalis muscle in the incisal anesthesia group, compared to the reference group (P = 0.018), during the split phase.The results of the present study indicated that altering different orofacial afferent inputs may have different effects on some aspects of oral fine motor control. Further, inhibition of afferent inputs from the orofacial or periodontal mechanoreceptors did not increase the variability of bite force values and jaw muscle activity; indicating that the relative precision of the oral fine motor task was not compromised inspite of the anesthesia. The results also suggest the propensity of optimization of bite force values and jaw muscle activity due to repeated splitting of the food morsels, inspite of alteration of sensory inputs.Skill acquisition following a change in oral sensory environment is crucial for understanding how humans learn and re-learn oral motor behaviors and the kind of adaptation that takes place after successful oral rehabilitation procedures.