- upper tip-link density
An electron-dense plaque at the upper end of a stereocilia tip link that provides the anchor in the stereocilia membrane on the side of the stereocilium where the tip link ends.
- lower tip-link density
An electron-dense plaque at the lower end of a stereocilia tip link that provides the anchor in the stereocilia membrane at the tip of the stereocilium from which the tip link rises.