Cochlear nerve diameter in normal hearing ears using high-resolution magnetic resonance imaging

The Laryngoscope
Eric M JaryszakPatrick J Antonelli

Abstract

Deficient cochlear nerves (CN) have been associated with poor cochlear implant performance. Normative data on CN diameter based on radiographic imaging have not been published. The objectives of this study were to determine if CN diameter could be reproducibly measured on parasagittal constructive interference in steady state (CISS)-sequence magnetic resonance imaging (MRI) and to establish a normative range for CN diameter. Retrospective review of MRI images by two independent blinded observers. Thirty patients (45 ears) with a CISS-sequence MRI done for auditory complaints in patients with normal hearing in one ear were included. CN diameters were measured in a parasagittal plane just medial to the internal auditory canal (IAC) fundus by two independent observers. Cross-sectional areas were calculated and interobserver agreement was evaluated. The CN was identified in 100% of studied ears. In 93%, the diameters were able to be measured by both observers. In 7% of ears, the cochlear nerve was unable to be measured secondary to the proximity of the CN to IAC wall. The CN vertical diameter (1.4 mm +/- 0.21 mm), horizontal diameter (1.0 mm +/- 0.15 mm), and cross-sectional area (1.1 mm +/- 0.26 mm(2)) were normally distributed. T...Continue Reading

References

Dec 11, 1992·The Annals of Otology, Rhinology, and Laryngology·J B Nadol, W Z Xu
Oct 1, 1995·The Annals of Otology, Rhinology, and Laryngology·Y NaitoY Sakaguchi
Mar 6, 2002·Acta Oto-laryngologica·Christina Stjernholm, Catharina Muren
Nov 6, 2003·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·P J GovaertsG De Ceulaer
Apr 14, 2004·Acta Oto-laryngologica. Supplementum·Takeshi MoritaJuichi Ito
Aug 29, 2006·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Oliver F AdunkaCraig A Buchman

❮ Previous
Next ❯

Citations

Jul 15, 2015·Clinical Neuroradiology·A Giesemann, E Hofmann
Nov 1, 2013·Magnetic Resonance in Medical Sciences : MRMS : an Official Journal of Japan Society of Magnetic Resonance in Medicine·Rei NakamichiShinji Naganawa
May 12, 2015·International Journal of Pediatric Otorhinolaryngology·Jing LouGuang-Bin Wang
Apr 7, 2016·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Catherine S BirmanElizabeth J Elliott
Aug 1, 2012·The Annals of Otology, Rhinology, and Laryngology·Christopher E FundakowskiSimon Angeli
Apr 16, 2011·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·Björn Herman, Simon Angeli
May 17, 2013·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·Clarice S ClemmensJohn A Germiller
Jun 7, 2017·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·Annika HennebergerWilhelm Flatz
Feb 23, 2021·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Yehree KimHong Ju Park

❮ Previous
Next ❯

Related Concepts

Related Feeds

Auditory Perception

Auditory perception is the ability to receive and interpret information attained by the ears. Here is the latest research on factors and underlying mechanisms that influence auditory perception.

Related Papers

Magnetic Resonance in Medical Sciences : MRMS : an Official Journal of Japan Society of Magnetic Resonance in Medicine
Rei NakamichiShinji Naganawa
Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
Björn Herman, Simon Angeli
© 2021 Meta ULC. All rights reserved