| Sulcus spiralis externus | |
|---|---|
 Floor of ductus cochlearis. | |
| Details | |
| Identifiers | |
| Latin | Sulcus spiralis externus |
| TA98 | A15.3.03.124 |
| FMA | 77851 |
| Anatomical terminology | |
The basilar crest gives attachment to the outer edge of the basilar membrane; immediately above the crest is a concavity, the sulcus spiralis externus.
