Related Experiment Video
Updated: Jun 24, 2026
06:04
Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
[Functional assessment of cochlear nerve and hearing]
1Service d'audiologie et explorations orofaciales, centre hospitalier Lyon-Sud, 69495 Pierre-Bénite, France. xavier.perrot@chu-lyon.fr
Neuro-Chirurgie
|March 21, 2009
Summary
Auditory functional assessment using audiometry, evoked otoacoustic emissions, and brainstem auditory evoked potentials is crucial for otoneurosurgical patients. This evaluation aids in surgical planning and monitoring hearing preservation and recovery.
Area of Science:
- Oto-neurosurgery
- Audiology
- Neurophysiology
Context:
- Increasingly early diagnosis of otoneurosurgical pathologies necessitates focus on functional prognosis.
- Hearing and cochlear nerve function are key considerations in cerebellopontine angle and related pathologies.
Purpose:
- To present current knowledge on auditory functional assessment methods in otoneurosurgery.
- To highlight the role of audiological evaluation in surgical planning and patient monitoring.
Summary:
- Preoperative audiological evaluation (audiometry, EOAEs, BAEPs) assesses hearing impact and informs surgical approach, including conservative options and intraoperative monitoring.
- Prognostic factors for hearing preservation include speech intelligibility, EOAE presence, and BAEPs wave III.
- Postoperative evaluation monitors for complications, assesses surgical impact on hearing, and facilitates long-term follow-up.
Impact:
- Auditory functional assessment is essential for optimizing patient care in otoneurosurgical conditions.
- Comparison of pre- and postoperative data provides feedback to refine surgical and electrophysiological monitoring techniques.
Related Concept Videos
01:13The Cochlea
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.
01:31Hearing
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
01:15Auditory Pathway
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 the...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
01:16Anatomy of the Ear
Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
01:22Hair Cells
Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.