| 释义 |
- References
{{Infobox anatomy
| Name = Sulcus spiralis externus
| Latin = Sulcus spiralis externus
| Image = Gray929.png
| Caption = Floor of ductus cochlearis.
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}}The basilar crest gives attachment to the outer edge of the basilar membrane; immediately above the crest is a concavity, the sulcus spiralis externus. References {{Gray's}}{{Auditory system}}{{Anatomy-stub}}{{Portal bar|Anatomy}} 1 : Ear |