spiral ligament

anatomy

Also known as: crista spiralis

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Last updated

July 14, 2026

Quick Summary

The spiral ligament is a fibrous structure located within the cochlea of the inner ear. It plays a crucial role in supporting the basilar membrane and is well-supplied with blood vessels, contributing to the formation of perilymph. The cochlea itself is a spiral-shaped cavity named after the Greek word for snail shell, and it houses the organ of hearing. Within the cochlea, the spiral ligament, along with the stria vascularis, forms the outer wall of the cochlear duct (scala media). This ligament's structure is denser in some areas and contains stout fibers that anchor the basilar membrane, which vibrates in response to sound waves.12

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human ear
Structure of the cochlea
The spiral ligament extends above the attachment of the Reissner membrane and is in contact with the perilymph in the scala vestibuli. Extending below the insertion of the basilar membrane, it is in contact with the perilymph of the scala tympani. It contains many stout fibres…
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The spiral ligament extends above the attachment of the Reissner membrane and is in contact with the perilymph in the scala vestibuli. Extending below the insertion of the basilar membrane, it is in contact with the perilymph of the scala tympani. It contains many stout fibres…
Read More