Spiral ligament
# Spiral ligament

The spiral ligament is a fibrous cushion located between the stria vascularis and the bony otic capsule.

The periosteum, forming the outer wall of the cochlear duct (Latin: ductus cochlearis), is greatly thickened and altered in character.

## Additional images

* Transverse section of the cochlear duct of a fetal cat.
* Diagrammatic longitudinal section of the cochlea.
