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[鼓膜]纤维软骨环
Anulus fibrocartilagineus
定义
鼓膜周缘的大部分增厚，形成一个纤维软骨环，固定于外耳道内端的鼓沟内。该鼓沟在上方于Rivinus切迹处缺如，自此切迹两端延伸出两条带状结构，即鼓膜前锤骨襞和鼓膜后锤骨襞，向锤骨外侧突延伸。
參考資料
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
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