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首页> 外文期刊>Bioinspiration & biomimetics >Why the semicircular canals are not stimulated by linear accelerations
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Why the semicircular canals are not stimulated by linear accelerations

机译：为什么半圆形管道没有通过线性加速刺激

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摘要

Head accelerations are sensed by the vestibular system in the inner ear. Linear accelerations stimulate the otolith organs, while the semicircular canals (SCC) sense angular accelerations. Fluid-structure interaction (FSI) models of the cupula sensor (simulated with finite element method (FEM)) and the endolymph fluid (simulated with computational fluid dynamics (CFD)) in the semicircular canal offer the possibility to investigate why the SCC are not stimulated by linear accelerations. Two hypotheses exist in the literature. The first hypothesis focusses on the density of the cupula sensor in the SCC, while the second is based on the continuous loop of fluid in the semicircular canal. However, neither increasing the cupula density, nor disrupting the continuous fluid circulation substantially increase the cupula deformation under linear head acceleration, thereby rejecting both existing hypotheses. We propose an alternative hypothesis, based on the circular geometry of the semicircular canal. During angular head acceleration, the cupula intersects the body of endolymph and 'pushes' it forward because the cupula seals the semicircular canal like a diaphragm. This results in cupula deflection and neural stimulation. During linear head acceleration, on the other hand, a large part of the canal wall also 'pushes' the endolymph forward, which leads to hardly any cupula deflection.
机译：头部加速度由内耳前庭系统感测。线性加速度刺激耳石器官，而半圆公司（SCC）感测角加速。圆周传感器的流体结构相互作用（FSI）模型（用有限元法（FEM））和内淋巴流体（用计算流体动力学（CFD））中的半圆管中的可能性提供了调查SCC不是的原因通过线性加速刺激。文献中存在两个假设。第一个假设侧重于SC​​C中圆环传感器的密度，而第二个假设侧重于SC​​C中的连续环的半圆管中的流体。然而，既不增加圆周密度，也不会破坏连续流体循环，基本上增加了线性头部加速下的圆环变形，从而拒绝了现有的假设。我们提出了一种基于半圆管的圆形几何形状的替代假设。在角头加速期间，圆环与内秋体的体系相交，因为圆环像隔膜一样密封半圆管。这导致圆周偏转和神经刺激。另一方面，在线性头部加速期间，车辆墙的大部分也“推动”前脊椎向前，这导致任何圆周偏转。

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