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The osseous spiral lamina is a bony shelf or ledge which projects from the modiolus into the interior of the canal, and, like the canal, takes two-and-three-quarter turns around the modiolus. It reaches about half-way toward the outer wall of the tube, and partially divides its cavity into two passages or scalae, of which the upper is named the scala vestibuli, while the lower is termed the scala tympani. From the spiral canal of the modiolus numerous canals pass outward through the osseous spiral lamina as far as its free edge.

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  • Osseous spiral lamina (en)
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  • The osseous spiral lamina is a bony shelf or ledge which projects from the modiolus into the interior of the canal, and, like the canal, takes two-and-three-quarter turns around the modiolus. It reaches about half-way toward the outer wall of the tube, and partially divides its cavity into two passages or scalae, of which the upper is named the scala vestibuli, while the lower is termed the scala tympani. From the spiral canal of the modiolus numerous canals pass outward through the osseous spiral lamina as far as its free edge. (en)
foaf:name
  • Osseous spiral lamina (en)
name
  • Osseous spiral lamina (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Gray933.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Gray923.png
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  • The cochlea and vestibule, viewed from above. (en)
  • Part of the cochlear division of the acoustic nerve, highly magnified. (en)
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  • Gray933.png (en)
has abstract
  • The osseous spiral lamina is a bony shelf or ledge which projects from the modiolus into the interior of the canal, and, like the canal, takes two-and-three-quarter turns around the modiolus. It reaches about half-way toward the outer wall of the tube, and partially divides its cavity into two passages or scalae, of which the upper is named the scala vestibuli, while the lower is termed the scala tympani. Near the summit of the cochlea the lamina ends in a hook-shaped process, the ; this assists in forming the boundary of a small opening, the helicotrema, through which the two communicate with each other. From the spiral canal of the modiolus numerous canals pass outward through the osseous spiral lamina as far as its free edge. In the lower part of the first turn a second bony lamina, the , projects inward from the outer wall of the bony tube; it does not, however, reach the primary osseous spiral lamina, so that if viewed from the vestibule a narrow fissure, the , is seen between them. (en)
Latin
  • lamina spiralis ossea (en)
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