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Updated: Jun 19, 2026
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
Does brain activity at rest reflect adaptive strategies? Evidence from speech processing after cochlear implantation
K Strelnikov1, J Rouger, J-F Demonet
1Université Toulouse, CerCo, Université Paul Sabatier, 31062 Toulouse, France.
Cerebral Cortex (New York, N.Y. : 1991)
|October 7, 2009
Summary
Long-term deafness and cochlear implantation (CI) alter brain activity at rest. CI patients show increased blood flow in visual, auditory, and language areas, indicating functional cortical reorganization.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Neuroimaging
Background:
- Functional neuroimaging defines task-related activity as signal differences during stimulation versus rest.
- The impact of long-term sensory environment changes on resting-state brain activity remains under investigation.
Purpose of the Study:
- To investigate whether long-term alterations in auditory experience affect resting-state brain activity.
- To explore functional cortical reorganization in deaf patients following cochlear implantation (CI).
Main Methods:
- Comparison of regional cerebral blood flow (rCBF) between normally hearing controls and cochlear-implanted (CI) deaf patients.
- Analysis of brain activity at rest, without specific sensory stimulation.
Main Results:
- Cochlear-implanted (CI) subjects exhibited altered cerebral blood flow patterns at rest compared to controls.
- Increased activity was observed in the visual cortex, auditory cortex, Broca area, and posterior temporal cortex in CI patients.
- These changes in resting-state activity occurred within the first year after cochlear implant activation.
Conclusions:
- Profound deafness followed by partial auditory restoration via cochlear implantation induces significant functional cortical reorganization.
- Resting-state brain activity is dynamically altered by long-term changes in sensory experience, particularly in auditory and related cortical areas.
