A human temporal bone study of stapes footplate movement.
A human temporal bone study of stapes footplate movement.
复制标题
镫骨足板运动的人类颞骨研究。
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
A. Huber
中科院分区：
文献类型：
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作者：
K. Heiland;R. Goode;M. Asai;A. Huber
目的
本研究旨在确定镫骨运动是活塞式的还是复杂的。
背景
文献提供了矛盾的信息是否镫骨踏板运动只是活塞式或其他类型的运动，如铰链或摇摆。
方法
使用10具新鲜人尸体颞骨，通过扩大面隐窝入路将3个靶点放置在镫骨底板上。目标是位于前足板、中央足板和后足板长轴上的0.5 mm反光粘合剂材料。在90dB声压级输入鼓膜时，测量了0.2 - 10 kHz范围内三个目标的位移和相位。测量系统是一个复杂的激光多普勒振动计（LDV）。计算机程序（Tymptest）计算了三个部位的踏板位移和相对相位以及踏板长轴前后摇摆运动与中心位移的比值。
结果
在2.0 kHz以下，镫骨振动主要是活塞样的。在2.0 kHz以上，前后摇摆运动随频率增加而增加，在4.0 kHz附近，摇摆和活塞样运动近似相等。
结论
镫骨踏板振动主要是活塞式高达2.0 kHz，但变得更复杂，因为在更高的频率，在前后摇摆运动的增加。未观察到铰链样运动。这些信息可能有助于设计模仿或改善正常镫骨振动的听骨置换假体。
OBJECTIVE
This study was designed to determine whether stapes movement is pistonlike or complex.
BACKGROUND
The literature provides conflicting information on whether stapes footplate motion is only pistonlike or has other types of movement, such as hingelike or rocking.
METHODS
Using 10 freshly harvested human cadaver temporal bones, 3 targets were placed on the stapes footplate through an extended facial recess approach. The targets were 0.5-mm pieces of reflective adhesive material positioned on the long axis of the footplate at the anterior crus, central footplate, and posterior crus. Displacement and phase of the three targets were measured from 0.2 to 10 kHz at a 90dB sound pressure level input at the tympanic membrane. The measuring system was a sophisticated laser Doppler vibrometer (LDV). A computer program (Tymptest) calculated footplate displacement and relative phase at the three sites and the ratio of anterior-posterior rocking movement of the footplate long axis to displacement at the center.
RESULTS
Below 2.0 kHz, stapes vibration is predominately pistonlike. Above 2.0 kHz, anterior-posterior rocking motion increases logarithmically with frequency, and, near 4.0 kHz, rocking and pistonlike motion are approximately equal.
CONCLUSIONS
Stapes footplate vibration is primarily pistonlike up to 2.0 kHz but becomes more complex at higher frequencies because of an increase in anterior-posterior rocking motion. Hingelike movements were not observed. This information may be helpful in the design of ossicular replacement prostheses that mimic or improve upon normal stapes vibration.