osseous spiral lamina


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os·se·ous spi·ral lam·i·na

[TA]
a double plate of bone winding spirally around the modiolus, dividing the spiral canal of the cochlea incompletely into two regions, the scala tympani and scala vestibuli; between the two plates of this lamina, the fibers of the cochlear nerve reach the spiral organ (of Corti).
Farlex Partner Medical Dictionary © Farlex 2012

os·se·ous spi·ral lam·i·na

(os'ē-ŭs spī'răl lam'i-nă) [TA]
A double plate of bone winding spirally around the modiolus dividing thespiral canal of the cochlea incompletely into two, scala tympani and scala vestibuli; between the two plates of this lamina the fibers of the cochlear nerve reach the spiral organ (organ of Corti).
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
There is also a potential for basal trauma to the osseous spiral lamina or basilar membrane due to basal buckling, especially with flexible lateral wall electrode with larger basal diameters [13, 26, 27].
This damage ranges from relatively minor displacement of the basilar membrane to severe fracture of the osseous spiral lamina, tearing of the basilar membrane or spiral ligament, and deviation of the electrode path from its intended location in the ST to the overlying scala media and/or scala vestibuli.
One contact of each pair was oriented on the medial side of the electrode carrier toward the position of the spiral ganglion, and the second contact was oriented on the upper surface of the carrier toward the osseous spiral lamina or basilar membrane.
For the purpose of this study, a specimen was considered to have severe trauma if any portion of the electrode had deviated from the ST into the scala media or scala vestibuli with associated fracture of the osseous spiral lamina, tearing of the basilar membrane, or dislocation of the spiral ligament.
Rotation of the osseous spiral lamina from the hook region along the basal turn of the cochlea: results of a magnetic resonance image anatomical study using high-resolution DRIVE sequences.