Spiral lamina

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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Article information

rID: 55259
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • Spiral laminae
  • Laminae spiralis

Cases and figures

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    Figure 1: spiral lamina (CT)
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