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 language | English |
|---|---|
| Pages (from-to) | 1094-1104 |
| Number of pages | 11 |
| Journal | Journal of Neurosurgery |
| Volume | 125 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Nov 1 2016 |
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All Science Journal Classification (ASJC) codes
- Surgery
- Clinical Neurology
Cite this
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 journal › Article
}
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 -