Audiological Features in 63 Patients With Cochlear Nerve Deficiency

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Kazuki Matsuura ◽  
Hidekane Yoshimura ◽  
Jun Shinagawa ◽  
Masahiro Kurozumi ◽  
Yutaka Takumi
2011 ◽  
Vol 121 (9) ◽  
pp. 1979-1988 ◽  
Author(s):  
Craig A. Buchman ◽  
Holly F. B. Teagle ◽  
Patricia A. Roush ◽  
Lisa R. Park ◽  
Debora Hatch ◽  
...  

2017 ◽  
Vol 131 (8) ◽  
pp. 676-683 ◽  
Author(s):  
E Tahir ◽  
M D Bajin ◽  
G Atay ◽  
B Ö Mocan ◽  
L Sennaroğlu

AbstractObjectives:The bony cochlear nerve canal is the space between the fundus of the internal auditory canal and the base of the cochlear modiolus that carries cochlear nerve fibres. This study aimed to determine the distribution of bony labyrinth anomalies and cochlear nerve anomalies in patients with bony cochlear nerve canal and internal auditory canal atresia and stenosis, and then to compare the diameter of the bony cochlear nerve canal and internal auditory canal with cochlear nerve status.Methods:The study included 38 sensorineural hearing loss patients (59 ears) in whom the bony cochlear nerve canal diameter at the mid-modiolus was 1.5 mm or less. Atretic and stenotic bony cochlear nerve canals were examined separately, and internal auditory canals with a mid-point diameter of less than 2 mm were considered stenotic. Temporal bone computed tomography and magnetic resonance imaging scans were reviewed to determine cochlear nerve status.Results:Cochlear hypoplasia was noted in 44 out of 59 ears (75 per cent) with a bony cochlear nerve canal diameter at the mid-modiolus of 1.5 mm or less. Approximately 33 per cent of ears with bony cochlear nerve canal stenosis also had a stenotic internal auditory canal and 84 per cent had a hypoplastic or aplastic cochlear nerve. All patients with bony cochlear nerve canal atresia had cochlear nerve deficiency. The cochlear nerve was hypoplastic or aplastic when the diameter of the bony cochlear nerve canal was less than 1.5 mm and the diameter of the internal auditory canal was less than 2 mm.Conclusion:The cochlear nerve may be aplastic or hypoplastic even if temporal bone computed tomography findings indicate a normal cochlea. If possible, patients scheduled to receive a cochlear implant should undergo both computed tomography and magnetic resonance imaging of the temporal bone. The bony cochlear nerve canal and internal auditory canal are complementary structures, and both should be assessed to determine cochlear nerve status.


2013 ◽  
Vol 149 (2) ◽  
pp. 318-325 ◽  
Author(s):  
Clarice S. Clemmens ◽  
Jessica Guidi ◽  
Aviva Caroff ◽  
Samuel J. Cohn ◽  
Jason A. Brant ◽  
...  

2014 ◽  
Vol 151 (1_suppl) ◽  
pp. P93-P93
Author(s):  
Giacomo Colletti ◽  
Marco Mandala ◽  
Liliana Colletti ◽  
Vittorio Colletti

2012 ◽  
Vol 13 (1) ◽  
pp. 16-25 ◽  
Author(s):  
Peter Roland ◽  
Kathryn Henion ◽  
Timothy Booth ◽  
Julia Dee Campbell ◽  
Anu Sharma

2012 ◽  
Vol 76 (8) ◽  
pp. 1188-1195 ◽  
Author(s):  
Zhihua Zhang ◽  
Yun Li ◽  
Lingxiang Hu ◽  
Zhaoyan Wang ◽  
Qi Huang ◽  
...  

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