...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Biomechanics >Geometrical resolution limits and detection mechanisms in the oral cavity.
【24h】

Geometrical resolution limits and detection mechanisms in the oral cavity.

机译：口腔中的几何分辨率限制和检测机制。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The objective of this work is to gain more insight into the processes of oral perception of food texture. Particularly, the limits for detectable thickness differences of objects, which are evaluated in the human mouth, are investigated. In a sensory study small, flexible circular disks (diameter in mm range) of varying thickness (in microm range) and material properties are evaluated between tongue and palate in human subjects. The thicker sample is identified in pair comparison tests. Experimental evidence suggests the existence of one detection process (attempt to align tongue and palate and the disk between them) to which the tongue-palate system reacts in two different ways: (1) by bending the disk (thickness below 125 microm, Young's modulus of 480 MPa) and (2) by impressing the disk into the tongue (thickness above approximately 200 microm, Young's modulus of 480 MPa), whereas the first reaction is necessarily followed by the second if the first one fails. For both ranges, differences in thickness of 25 microm can be detected. The two reaction processes cover isolated ranges and leave an insecure detection range in between them, for which neither one of the processes applies. Since deformation and load distribution on the disk are supposed to play a major role in the first detection process (the loads exerted on the disk in order to bend it are compared), we formulate a mathematical model to quantify these mechanical effects. The model is employed to identify parameter constellations (thickness, material properties) for which the insecure range is omitted or the range is enlarged. Theoretical findings are confirmed by further experiments. Their results are consistent with the characteristics and functioning of the mechanoreceptors in-mouth.
机译：这项工作的目的是对口腔对食物质地的感知过程有更多的了解。特别地，研究了在人口中评估的物体的可检测厚度差的极限。在一项感官研究中，评估了人类受试者舌和pa之间厚度不同（微米范围）和材料特性的小型柔性圆盘（直径在mm范围内）。在配对比较测试中识别出较厚的样品。实验证据表明，存在一种检测过程（试图使舌和pa以及它们之间的圆盘对齐），舌system系统以两种不同的方式对其进行反应：（1）通过弯曲圆盘（厚度低于125微米，杨氏模量） （480 MPa）和（2）通过将椎间盘压入舌头（厚度约200微米，杨氏模量为480 MPa）进行，而如果第一个反应失败，则必须先进行第二个反应。对于这两个范围，可以检测到25微米的厚度差异。这两个反应过程涵盖了孤立的范围，并且在它们之间留下了不安全的检测范围，这两个过程都不​​适用。由于磁盘的变形和载荷分布应该在第一个检测过程中起主要作用（比较磁盘弯曲时所施加的载荷），因此我们建立了数学模型来量化这些机械效应。该模型用于识别参数星座图（厚度，材料特性），其中不安全范围被忽略或范围被扩大。理论发现被进一步的实验证实。他们的结果与口内机械感受器的特征和功能一致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号