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Related Concept Videos

Auditory Pathway01:15

Auditory 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...
The Cochlea01:13

The 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.
Hearing01:31

Hearing

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.
Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...
The Auditory Ossicles01:11

The Auditory Ossicles

The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...

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Related Experiment Video

Updated: Jun 22, 2026

Robotic Cochlear Implantation for Direct Cochlear Access
08:06

Robotic Cochlear Implantation for Direct Cochlear Access

Published on: June 16, 2022

[Central auditory prosthesis].

T Lenarz1, H Lim, G Joseph

  • 1Hals-Nasen-Ohrenklinik, Medizinische Hochschule Hannover, Hannover, Germany. lenarz.thomas@mh-hannover.de

HNO
|June 12, 2009
PubMed
Summary
This summary is machine-generated.

Cochlear implants help deaf patients, but not those with damaged auditory nerves. An auditory midbrain implant (AMI) is a new potential solution for these patients, offering improved speech perception.

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Performing Intracochlear Electrocochleography During Cochlear Implantation
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Performing Intracochlear Electrocochleography During Cochlear Implantation

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Otolaryngology

Context:

  • Severe sensorineural hearing loss often necessitates cochlear implants (CI) for auditory nerve stimulation.
  • Patients with neurofibromatosis type 2 (NF2) and neural deafness lack functional auditory nerves, precluding CI use.
  • Current auditory brainstem implants (ABI) offer limited speech perception for NF2 patients.

Purpose:

  • To introduce the auditory midbrain implant (AMI) as a novel central auditory prosthesis.
  • To evaluate the potential of stimulating the inferior colliculus (IC) for auditory restoration.
  • To present the current research status of central auditory prostheses, including ABI and AMI.

Summary:

  • A human prototype auditory midbrain implant (AMI) has been developed to stimulate the inferior colliculus (IC).
  • The IC serves as a potential target for auditory prostheses, offering access to neural pathways crucial for speech perception.
  • This research details the technology, surgical aspects, and hearing outcomes of central auditory prostheses like ABI and the novel AMI.

Impact:

  • The auditory midbrain implant (AMI) represents a promising alternative for deaf patients with non-functional auditory nerves.
  • This research advances the development of central auditory prostheses, potentially improving speech perception and quality of life.
  • The findings contribute to the understanding and application of neurostimulation for hearing restoration in complex cases.