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目的探究双耳3对半规管在感受有角运动时力学行为表达的规律。方法采用有限元法数值模拟一例健康人头部水平正弦转动时左、右耳3对半规管的力学响应。结果各平衡感受器嵴顶局部位移响应随着嵴顶位置改变而变化,但是3对嵴顶的体积应变响应是规律的,每对嵴顶均以与激励相同的频率等幅度膨胀或收缩。水平、前、后半规管3个嵴顶的体积应变幅值绝对值的比值恒定,近似为1.00︰0.80︰1.72。此外,水平半规管和前半规管嵴顶体积应变响应的相位相同,且与头转动速度的相位约相差14.4°,与后半规管嵴顶体积应变响应的相位相差180°。结论嵴顶体积应变可以较好地表征3对半规管感受有角运动的规律,其幅值、频率和相位可以分别反映刺激角速度的幅值、频率和相位,这一规律为进一步建立前庭眼反射的数量依存关系奠定基础,同时为眼震检查定量评估前庭功能提供理论依据。
Objective To investigate the regularity of mechanical behaviors of three pairs of semicircular canal in bilateral ears when they sense angular movement. Methods A finite element method was used to numerically simulate the mechanical responses of 3 pairs of semicircular canals in the left and right ears of a healthy human with a sinusoidal rotation. Results The local displacement responses at the crest of each balancer changed with the change of crest position. However, the volumetric strain responses of the three crestings were regular, and the crest of each crest expanded or contracted at the same frequency as the excitation. Horizontal, before and after semicircular canal at the top of the three crest volume strain amplitude absolute value of a constant ratio, approximately 1.00: 0.80: 1.72. In addition, the phase responses of the horizontal semicircular canal and the anterior semicircular canal at the top of the crest were the same, with a phase difference of 14.4 ° from that of the head and a 180 ° difference from the phase response of the crestal volume of the posterior semicircular canal. Conclusions The volumetric strain at the crest can better characterize the regularity of angular movement of the semicircular canals. The amplitude, frequency and phase of the crest can reflect the amplitude, frequency and phase of the stimulating angular velocity, respectively. This rule is to further establish the vestibular reflex The number of dependencies to lay the foundation for the quantitative evaluation of vestibular function for nystagmus to provide a theoretical basis.