The cochlea in skull base surgery: An anatomy study

Jian Wang, Fumitaka Yoshioka, Wonil Joo, Noritaka Komune, Vicent Quilis-Quesada, Albert L. Rhoton

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Objective The object of this study was to examine the relationships of the cochlea as a guide for avoiding both cochlear damage with loss of hearing in middle fossa approaches and injury to adjacent structures in approaches directed through the cochlea. methods Twenty adult cadaveric middle fossae were examined using magnifcations of ×3 to ×40. results The cochlea sits below the?oor of the middle fossa in the area between and below the labyrinthine segment of the facial nerve and greater petrosal nerve (GPN) and adjacent to the lateral genu of the petrous carotid. Approximately one-third of the cochlea extends below the medial edge of the labyrinthine segment of the facial nerve, geniculate ganglion, and proximal part of the GPN. The medial part of the basal and middle turns are the parts at greatest risk in drilling the?oor of the middle fossa to expose the nerves in middle fossa approaches to the internal acoustic meatus and in anterior petrosectomy approaches. Resection of the cochlea is used selectively in extending approaches through the mastoid toward the lateral edge of the clivus and front of the brainstem. coNclusioNs An understanding of the location and relationships of the cochlea will reduce the likelihood of cochlear damage with hearing loss in approaches directed through the middle fossa and reduce the incidence of injury to adjacent structures in approaches directed through the cochlea.

Original languageEnglish
Pages (from-to)1094-1104
Number of pages11
JournalJournal of Neurosurgery
Volume125
Issue number5
DOIs
Publication statusPublished - Nov 1 2016

Fingerprint

Cochlea
Skull Base
Anatomy
Facial Nerve
Hearing Loss
Geniculate Ganglion
Posterior Cranial Fossa
Mastoid
Wounds and Injuries
Acoustics
Brain Stem
Incidence

All Science Journal Classification (ASJC) codes

  • Surgery
  • Clinical Neurology

Cite this

Wang, J., Yoshioka, F., Joo, W., Komune, N., Quilis-Quesada, V., & Rhoton, A. L. (2016). The cochlea in skull base surgery: An anatomy study. Journal of Neurosurgery, 125(5), 1094-1104. https://doi.org/10.3171/2015.8.JNS151325

The cochlea in skull base surgery : An anatomy study. / Wang, Jian; Yoshioka, Fumitaka; Joo, Wonil; Komune, Noritaka; Quilis-Quesada, Vicent; Rhoton, Albert L.

In: Journal of Neurosurgery, Vol. 125, No. 5, 01.11.2016, p. 1094-1104.

Research output: Contribution to journalArticle

Wang, J, Yoshioka, F, Joo, W, Komune, N, Quilis-Quesada, V & Rhoton, AL 2016, 'The cochlea in skull base surgery: An anatomy study', Journal of Neurosurgery, vol. 125, no. 5, pp. 1094-1104. https://doi.org/10.3171/2015.8.JNS151325
Wang J, Yoshioka F, Joo W, Komune N, Quilis-Quesada V, Rhoton AL. The cochlea in skull base surgery: An anatomy study. Journal of Neurosurgery. 2016 Nov 1;125(5):1094-1104. https://doi.org/10.3171/2015.8.JNS151325
Wang, Jian ; Yoshioka, Fumitaka ; Joo, Wonil ; Komune, Noritaka ; Quilis-Quesada, Vicent ; Rhoton, Albert L. / The cochlea in skull base surgery : An anatomy study. In: Journal of Neurosurgery. 2016 ; Vol. 125, No. 5. pp. 1094-1104.
@article{7de65c3ed5764585ab38c02f5b3b88cf,
title = "The cochlea in skull base surgery: An anatomy study",
abstract = "Objective The object of this study was to examine the relationships of the cochlea as a guide for avoiding both cochlear damage with loss of hearing in middle fossa approaches and injury to adjacent structures in approaches directed through the cochlea. methods Twenty adult cadaveric middle fossae were examined using magnifcations of ×3 to ×40. results The cochlea sits below the?oor of the middle fossa in the area between and below the labyrinthine segment of the facial nerve and greater petrosal nerve (GPN) and adjacent to the lateral genu of the petrous carotid. Approximately one-third of the cochlea extends below the medial edge of the labyrinthine segment of the facial nerve, geniculate ganglion, and proximal part of the GPN. The medial part of the basal and middle turns are the parts at greatest risk in drilling the?oor of the middle fossa to expose the nerves in middle fossa approaches to the internal acoustic meatus and in anterior petrosectomy approaches. Resection of the cochlea is used selectively in extending approaches through the mastoid toward the lateral edge of the clivus and front of the brainstem. coNclusioNs An understanding of the location and relationships of the cochlea will reduce the likelihood of cochlear damage with hearing loss in approaches directed through the middle fossa and reduce the incidence of injury to adjacent structures in approaches directed through the cochlea.",
author = "Jian Wang and Fumitaka Yoshioka and Wonil Joo and Noritaka Komune and Vicent Quilis-Quesada and Rhoton, {Albert L.}",
year = "2016",
month = "11",
day = "1",
doi = "10.3171/2015.8.JNS151325",
language = "English",
volume = "125",
pages = "1094--1104",
journal = "Journal of Neurosurgery",
issn = "0022-3085",
publisher = "American Association of Neurological Surgeons",
number = "5",

}

TY - JOUR

T1 - The cochlea in skull base surgery

T2 - An anatomy study

AU - Wang, Jian

AU - Yoshioka, Fumitaka

AU - Joo, Wonil

AU - Komune, Noritaka

AU - Quilis-Quesada, Vicent

AU - Rhoton, Albert L.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Objective The object of this study was to examine the relationships of the cochlea as a guide for avoiding both cochlear damage with loss of hearing in middle fossa approaches and injury to adjacent structures in approaches directed through the cochlea. methods Twenty adult cadaveric middle fossae were examined using magnifcations of ×3 to ×40. results The cochlea sits below the?oor of the middle fossa in the area between and below the labyrinthine segment of the facial nerve and greater petrosal nerve (GPN) and adjacent to the lateral genu of the petrous carotid. Approximately one-third of the cochlea extends below the medial edge of the labyrinthine segment of the facial nerve, geniculate ganglion, and proximal part of the GPN. The medial part of the basal and middle turns are the parts at greatest risk in drilling the?oor of the middle fossa to expose the nerves in middle fossa approaches to the internal acoustic meatus and in anterior petrosectomy approaches. Resection of the cochlea is used selectively in extending approaches through the mastoid toward the lateral edge of the clivus and front of the brainstem. coNclusioNs An understanding of the location and relationships of the cochlea will reduce the likelihood of cochlear damage with hearing loss in approaches directed through the middle fossa and reduce the incidence of injury to adjacent structures in approaches directed through the cochlea.

AB - Objective The object of this study was to examine the relationships of the cochlea as a guide for avoiding both cochlear damage with loss of hearing in middle fossa approaches and injury to adjacent structures in approaches directed through the cochlea. methods Twenty adult cadaveric middle fossae were examined using magnifcations of ×3 to ×40. results The cochlea sits below the?oor of the middle fossa in the area between and below the labyrinthine segment of the facial nerve and greater petrosal nerve (GPN) and adjacent to the lateral genu of the petrous carotid. Approximately one-third of the cochlea extends below the medial edge of the labyrinthine segment of the facial nerve, geniculate ganglion, and proximal part of the GPN. The medial part of the basal and middle turns are the parts at greatest risk in drilling the?oor of the middle fossa to expose the nerves in middle fossa approaches to the internal acoustic meatus and in anterior petrosectomy approaches. Resection of the cochlea is used selectively in extending approaches through the mastoid toward the lateral edge of the clivus and front of the brainstem. coNclusioNs An understanding of the location and relationships of the cochlea will reduce the likelihood of cochlear damage with hearing loss in approaches directed through the middle fossa and reduce the incidence of injury to adjacent structures in approaches directed through the cochlea.

UR - http://www.scopus.com/inward/record.url?scp=85018193864&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85018193864&partnerID=8YFLogxK

U2 - 10.3171/2015.8.JNS151325

DO - 10.3171/2015.8.JNS151325

M3 - Article

C2 - 26824375

AN - SCOPUS:85018193864

VL - 125

SP - 1094

EP - 1104

JO - Journal of Neurosurgery

JF - Journal of Neurosurgery

SN - 0022-3085

IS - 5

ER -