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Related Concept Videos

The Cochlea01:13

The Cochlea

51.6K
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
51.6K
Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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Related Experiment Video

Updated: Feb 23, 2026

Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice
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Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice

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Increased cross-modal functional connectivity in cochlear implant users.

Ling-Chia Chen1,2, Sebastian Puschmann3,4, Stefan Debener5,3,6

  • 1Neuropsychology Lab, Department of Psychology, European Medical School, University of Oldenburg, Oldenburg, Germany. ling-chia.chen@uni-oldenburg.de.

Scientific Reports
|September 1, 2017
PubMed
Summary
This summary is machine-generated.

Cochlear implants (CI) users show altered brain connectivity. Increased cross-modal connections between visual and auditory cortices in CI users correlate with better speech recognition, indicating successful hearing restoration.

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Sensory Neuroscience

Background:

  • Cochlear implant (CI) use is associated with cross-modal cortical reorganization in both visual and auditory areas.
  • The impact of sensory deprivation and restoration on functional connectivity within and between these systems in CI users remains unclear.

Purpose of the Study:

  • To investigate task-induced intra-modal and cross-modal functional connectivity in the visual and auditory cortices of post-lingually deaf CI users.
  • To compare functional connectivity patterns between CI users and age-matched normal hearing controls.

Main Methods:

  • Functional near-infrared spectroscopy (fNIRS) was employed to measure brain activity.
  • Task-induced intra-modal (hemispheric) and cross-modal (visual-auditory) functional connectivity were assessed during visual and auditory stimulus processing.

Main Results:

  • CI users demonstrated decreased intra-modal functional connectivity compared to controls.
  • CI users showed increased cross-modal functional connectivity between visual and left auditory cortices.
  • The degree of cross-modal connectivity difference between visual and auditory stimuli correlated with speech recognition performance in CI users.

Conclusions:

  • CI users exhibit a unique pattern of functional reorganization characterized by reduced intra-modal and enhanced cross-modal connectivity.
  • Enhanced cross-modal connectivity, particularly for auditory stimuli, is linked to successful hearing rehabilitation outcomes in CI users.