Work

The association of intraoperative electric field and neural excitation patterns of the cochlear implant with patient-related factors of age, gender, cochlear diameter, and postoperative speech measures

Year: 2024

Type: article

Abstract: • The electric field and neural excitation patterns of the cochlear implant are related. • Measures of electric field and neural excitation differ in adults and children. • The spread of intracochlear electric field is associated with cochlear diameter. • The intracochlear current spread is related to postoperative speech recognition. To assess the relationships between the electric field (EF) and neural excitation patterns in cochlear implants (CIs) and explore their associations with the cochlear diameter, patient age and gender, and postoperative speech recognition. The intraoperative transimpedance matrix (TIM) and spread of excitation (SOE) measures were computed to obtain their 50 % widths corresponding to six electrode contacts of a lateral-wall electrode array. The measures were then analyzed for intercorrelations, associations with the cochlear diameter, as well as age and gender-related differences. The relationships between the computed intraoperative measures and postimplant speech recognition were also studied. The TIM and SOE 50 % widths present moderate correlations and exhibit differences between adults and children. The TIM 50 % widths show additional associations with the cochlear diameter and partly vary with the implantee's gender. Speech recognition was found to have a significant relationship with the exponential spread coefficients (ESCs) obtained for individual electrode contacts. Although interrelated, the EF and neural excitation measures of the CI are associated with different variables. The ESC, derived from computations of the TIM , is the only measure linked to postoperative speech recognition.

Source: Hearing Research

DOI: 10.1016/j.heares.2024.109131

Authors: Priyanka Mohan, Saku T. Sinkkonen, Ville Sivonen

Institutions: University of Helsinki, Helsinki University Hospital

Language: English

Topic: Hearing Loss and Rehabilitation

Subfield: Cognitive Neuroscience

Field: Neuroscience

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: hybrid

Estimated APC paid: $4,010