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Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
Published on: June 21, 2024
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Cochlear implants: Visual evoked potentials study.
Takwa Gabr1, Tarek Eldessouki2, Ahmed Hashem3
1Audiovestibular Medicine Unit, Otolaryngology Department, Kafrelsheikh University Hospitals, Kafr Elsheikh, Egypt.
International Journal of Pediatric Otorhinolaryngology
|August 5, 2022
Summary
Children with cochlear implants (CIs) show altered visual processing. This study found higher P100 amplitudes in pattern visual evoked potentials (pVEPs) for children with CIs compared to normal hearing peers, indicating visual cortex reorganization.
Area of Science:
- Neuroscience
- Audiology
- Ophthalmology
Background:
- Severe-to-profound hearing loss (HL) can lead to cross-modal plasticity, where the visual cortex recruits areas typically used for auditory processing.
- Cochlear implants (CIs) offer a successful auditory rehabilitation alternative for individuals with severe-to-profound HL.
Purpose of the Study:
- To investigate visual evoked potentials (VEPs) in children with CIs compared to normally hearing children.
- To explore potential cross-modal reorganization within the visual cortex in pediatric CI users.
Main Methods:
- Two groups were studied: 20 normally hearing children (control) and 25 children with unilateral CIs.
- Methods included otological history, CI performance checks (physical, aided sound field), ophthalmic examination, and pattern visual evoked potentials (pVEPs).
Main Results:
- No significant differences in age or sex between groups.
- All participants had normal ophthalmic examinations, and CI users showed satisfactory aided responses.
- Children with CIs exhibited a significantly higher P100 amplitude in pVEPs compared to the control group.
Conclusions:
- Deafness induces cortical reorganization extending beyond the auditory cortex into the visual cortex.
- This suggests that the visual system adapts and reorganizes in response to hearing loss and CI use.
