对灰鼠中耳导纳有贡献的结构。
Structures that contribute to middle-ear admittance in chinchilla.
作者信息
Rosowski John J, Ravicz Michael E, Songer Jocelyn E
机构信息
Eaton-Peabody of Auditory Physiology, Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, MA, USA.
出版信息
J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2006 Dec;192(12):1287-311. doi: 10.1007/s00359-006-0159-9. Epub 2006 Aug 30.
Abstract
We describe measurements of middle-ear input admittance in chinchillas (Chinchilla lanigera) before and after various manipulations that define the contributions of different middle-ear components to function. The chinchilla's middle-ear air spaces have a large effect on the low-frequency compliance of the middle ear, and removing the influences of these spaces reveals a highly admittant tympanic membrane and ossicular chain. Measurements of the admittance of the air spaces reveal that the high-degree of segmentation of these spaces has only a small effect on the admittance. Draining the cochlea further increases the middle-ear admittance at low frequencies and removes a low-frequency (less than 300 Hz) level dependence in the admittance. Spontaneous or sound-driven contractions of the middle-ear muscles in deeply anesthetized animals were associated with significant changes in middle-ear admittance.
摘要
我们描述了在各种操作前后对龙猫（Chinchilla lanigera）中耳输入导纳的测量，这些操作确定了不同中耳成分对功能的贡献。龙猫的中耳气腔对中耳的低频顺应性有很大影响，去除这些气腔的影响后可发现鼓膜和听骨链具有很高的导纳。对气腔导纳的测量表明，这些气腔的高度分隔对导纳的影响很小。排空耳蜗进一步增加了低频时的中耳导纳，并消除了导纳中的低频（低于300Hz）水平依赖性。在深度麻醉的动物中，中耳肌肉的自发或声音驱动收缩与中耳导纳的显著变化有关。
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