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Updated: Jun 28, 2026
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Extracting the Cochlea from a Human Temporal Bone: A Cadaveric Protocol
Published on: August 18, 2023
[Applied anatomic study on lamina spiralis below promontory for cochlear implantation]
Changxue Wang1, Suming Jiang, Jinfeng Liu
1Department of Anatomy, Medical College of Shantou University, Shantou 515041, China.
Summary
This study segments the basal turn lamina spiralis (LS) into three parts, providing anatomical references for cochlear implantation. Findings aid in locating the basal turn scala tympani for minimally invasive procedures.
Area of Science:
- Otolaryngology and neuroanatomy
- Surgical anatomy of the human temporal bone
Context:
- Cochlear implantation requires precise anatomical knowledge for optimal electrode placement.
- The lamina spiralis (LS) is a critical structure within the cochlea, influencing surgical approaches.
Purpose:
- To delineate the microanatomy of the basal turn lamina spiralis (LS) on the surface of the promontory.
- To establish a method for accurately locating the LS for cochlear implantation.
- To provide essential anatomical data for minimally invasive cochlear implant surgery.
Summary:
- A microanatomical study of 30 human temporal bones divided the basal turn LS into hook, anteroinferior round window, and forwarding segments.
- Key hinge points and angular measurements relative to the facial nerve and stapes head were identified.
- Measurements of scala tympani width at the cochleostomy site offer further anatomical guidance.
Impact:
- The study offers a reliable anatomical basis for the precise localization of the basal turn scala tympani.
- Findings facilitate minimally invasive cochlear implantation by providing clear landmarks for electrode insertion.
- Enhanced understanding of LS anatomy improves surgical planning and outcomes in cochlear implant procedures.
