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Testing the Diagnostic Value of Electrical Ear Canal Stimulation in Cochlear Implant Candidates by Functional Magnetic Resonance Imaging
- Source :
- Audiology and Neurotology. 13:281-292
- Publication Year :
- 2008
- Publisher :
- S. Karger AG, 2008.
-
Abstract
- Prior to cochlear implant (CI) surgery in children, the integrity of the auditory pathway is sometimes assessed by electrical ear canal stimulation (ECS). However, the evaluation of reactions as auditory is subjective. To test the prognostic value of ECS, functional magnetic resonance imaging (fMRI) was performed during ECS vicariously in 18 adult CI candidates. Activation of the primary auditory cortex was detected in 9 of 16 cases when auditory sensations during ECS occurred, and tended to be more bilaterally distributed in CI candidates than in normal-hearing controls. ECS sensations only tended to correlate with fMRI activations. However, solely frequency discrimination during electrical stimulation predicted CI outcome, but neither other auditory sensations nor fMRI activations did so satisfactorily, which limits the diagnostic value of these measures. Instead, preoperative residual hearing (nonamplified and amplified) was a robust predictor for CI benefit.
- Subjects :
- Adult
Male
medicine.medical_specialty
Physiology
medicine.medical_treatment
Stimulation
Deafness
Audiology
Functional Laterality
Speech and Hearing
Audiometry
Hearing
Cochlear implant
Preoperative Care
otorhinolaryngologic diseases
Humans
Medicine
Ear canal
Aged
medicine.diagnostic_test
business.industry
Electrodiagnosis
Middle Aged
Magnetic Resonance Imaging
Electric Stimulation
Sensory Systems
Functional imaging
Cochlear Implants
medicine.anatomical_structure
Otorhinolaryngology
Auditory Perception
Female
sense organs
business
Functional magnetic resonance imaging
Ear Canal
Subjects
Details
- ISSN :
- 14219700 and 14203030
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- Audiology and Neurotology
- Accession number :
- edsair.doi.dedup.....a5e0d65338d3e41cd18404f2cb057f24