Auditory Cortical Plasticity in Patients with Single-Sided Deafness Before and After Cochlear Implantation.
J Assoc Res Otolaryngol
; 25(1): 79-88, 2024 Feb.
Article
en En
| MEDLINE
| ID: mdl-38253897
ABSTRACT
PURPOSE:
This study investigated neuroplastic changes induced by postlingual single-sided deafness (SSD) and the effects of a cochlear implantation for the deaf ear. Neural processing of acoustic signals from the normal hearing ear to the brain was studied before and after implantation using a positron emission tomography (PET)/CT scanner.METHODS:
Eight patients with postlingual SSD received a cochlear implant (CI) in a prospective clinical trial. Dynamic imaging was performed in a PET/CT scanner using radioactively labeled water ([15O]H2O) to localize changes in the regional cerebral blood flow (rCBF) with and without an auditory task of logatomes containing speech-like elements without meaningful context. The normal hearing ear was stimulated before implantation and after the use of the cochlear implant for at least 8 months (mean 13.5, range 8.1-26.6). Eight age- and gender-matched subjects with normal hearing on both sides served as healthy control subjects (HCS).RESULTS:
When the normal hearing ear of SSD patients was stimulated before CI implantation, the [15O]H2O-PET showed a more symmetrical rCBF in the auditory regions of both hemispheres in comparison to the HCS. The use of CI increased the asymmetry index (AI) in six of eight patients indicating an increase of activity of the contralateral hemisphere. Non-parametric statistics revealed a significant difference in the AI between patients before CI implantation and HCS (p < .01), which disappeared after CI implantation (p = .195).CONCLUSION:
The functional neuroimaging data showed a tendency towards normalization of neuronal activity after CI implantation, which supports the effectiveness of CI in SSD patients. TRIAL REGISTRATION ClinicalTrials.gov Identifier NCT01749592, December 13, 2012.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Percepción del Habla
/
Implantación Coclear
/
Sordera
/
Pérdida Auditiva Unilateral
Tipo de estudio:
Clinical_trials
Límite:
Humans
Idioma:
En
Revista:
J Assoc Res Otolaryngol
Asunto de la revista:
OTORRINOLARINGOLOGIA
Año:
2024
Tipo del documento:
Article
País de afiliación:
Suiza