Spiral lamina

Last revised by Assoc Prof Craig Hacking on 11 Mar 2019

The cochlear spiral lamina is a thin bone structure that projects from the modiolus, separating the cochlear canal in two main components or scala, the scala tympani (lower portion) and the scala vestibuli (upper portion).

At the cochlear apex, the spiral lamina ends in a hook-shaped process called the hamulus laminae spiralis, which assists in forming the helicotrema.

It supports the organ of Corti and the neurovascular termination to the modiolus.

See also

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