Prefrontal cortex supports speech perception in listeners with cochlear implants
| Autor: | Joseph P. Culver, Aahana Bajracharya, Mahlega S. Hassanpour, Noël Y. Dwyer, Jill B. Firszt, Jonathan E. Peelle, Arefeh Sherafati, Adam T. Eggebrecht |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Adult
medicine.medical_specialty Speech perception medicine.medical_treatment Population Prefrontal Cortex Audiology Spatial memory General Biochemistry Genetics and Molecular Biology Functional neuroimaging Cochlear implant otorhinolaryngologic diseases medicine Humans education education.field_of_study General Immunology and Microbiology General Neuroscience Cognition General Medicine Dorsolateral prefrontal cortex Cochlear Implants Memory Short-Term medicine.anatomical_structure Acoustic Stimulation QUIET Auditory Perception Speech Perception Psychology psychological phenomena and processes |
| Popis: | Cochlear implants are neuroprosthetic devices that can restore hearing in people with severe to profound hearing loss by electrically stimulating the auditory nerve. Because of physical limitations on the precision of this stimulation, the acoustic information delivered by a cochlear implant does not convey the same level of acoustic detail as that conveyed by normal hearing. As a result, speech understanding in listeners with cochlear implants is typically poorer and more effortful than in listeners with normal hearing. The brain networks supporting speech understanding in listeners with cochlear implants are not well understood, partly due to difficulties obtaining functional neuroimaging data in this population. In the current study, we assessed the brain regions supporting spoken word understanding in adult listeners with right unilateral cochlear implants (n=20) and matched controls (n=18) using high-density diffuse optical tomography (HD-DOT), a quiet and non-invasive imaging modality with spatial resolution comparable to that of functional MRI. We found that while listening to spoken words in quiet, listeners with cochlear implants showed greater activity in left prefrontal cortex than listeners with normal hearing, specifically in a region engaged in a separate spatial working memory task. These results suggest that listeners with cochlear implants require greater cognitive processing during speech understanding than listeners with normal hearing, supported by compensatory recruitment of left prefrontal cortex. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|