The effect of side of implantation on unilateral cochlear implant performance in patients with prelingual and postlingual sensorineural hearing loss: A systematic review

The effect of side of implantation on unilateral cochlear implant performance in patients with... KeypointsOne hemisphere in the brain is of greater influence on several brain functions compared to the contralateral hemisphere. As such, a dominant left hemisphere is seen in 95‐98% of right‐handed and in 70‐80% of left‐handed normal hearing subjects for speech perception and speech production.Although the auditory cortex receives auditory input from both ears, it is most strongly stimulated by the contralateral ear.The combination of the assumptions described above results in a phenomenon called the right ear advantage, meaning that in the majority of normal hearing subjects the right ear is most important for the perception and production of speech.The majority of studies in this systematic review found a right ear advantage in subjects with prelingual and postlingual sensorineural hearing loss (SNHL) after receiving a cochlear implant. No study found an advantage of a left‐implanted cochlear implant over a right‐implanted cochlear implant.Given the results found in this systematic review, we cautiously advise implanting the CI in the right ear when other prognostic factors do not favour the left ear and SNHL is symmetrical.INTRODUCTIONSince the introduction of cochlear implants (CIs), millions of patients have been implanted, of which the vast majority unilaterally. The selection of ear is based on various functional http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Clinical Otolaryngology Wiley

The effect of side of implantation on unilateral cochlear implant performance in patients with prelingual and postlingual sensorineural hearing loss: A systematic review

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Publisher
Wiley
Copyright
© 2018 John Wiley & Sons Ltd
ISSN
1749-4478
eISSN
1749-4486
D.O.I.
10.1111/coa.12988
Publisher site
See Article on Publisher Site

Abstract

KeypointsOne hemisphere in the brain is of greater influence on several brain functions compared to the contralateral hemisphere. As such, a dominant left hemisphere is seen in 95‐98% of right‐handed and in 70‐80% of left‐handed normal hearing subjects for speech perception and speech production.Although the auditory cortex receives auditory input from both ears, it is most strongly stimulated by the contralateral ear.The combination of the assumptions described above results in a phenomenon called the right ear advantage, meaning that in the majority of normal hearing subjects the right ear is most important for the perception and production of speech.The majority of studies in this systematic review found a right ear advantage in subjects with prelingual and postlingual sensorineural hearing loss (SNHL) after receiving a cochlear implant. No study found an advantage of a left‐implanted cochlear implant over a right‐implanted cochlear implant.Given the results found in this systematic review, we cautiously advise implanting the CI in the right ear when other prognostic factors do not favour the left ear and SNHL is symmetrical.INTRODUCTIONSince the introduction of cochlear implants (CIs), millions of patients have been implanted, of which the vast majority unilaterally. The selection of ear is based on various functional

Journal

Clinical OtolaryngologyWiley

Published: Jan 1, 2018

Keywords: ; ; ; ; ; ; ; ; ; ; ;

References

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