Inner tunnel

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Inner tunnel
Limbus laminæ spiralis and membrana basilaris. ("6" is Zona arcuata.)
Gray's subject #232 1056
Dorlands/Elsevier t_23/12832499

The basilar membrane stretches from the tympanic lip of the osseous spiral lamina to the basilar crest and consists of two parts, an inner and an outer. The inner is thin, and is named the inner tunnel (or zona arcuata): it supports the spiral organ of Corti.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.