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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.
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Hair Cells01:22

Hair Cells

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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.
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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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The Miniature Pig: A Large Animal Model for Cochlear Implant Research
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Biomimetic Artificial Basilar Membranes for Next-Generation Cochlear Implants.

Jongmoon Jang1, Jeong Hun Jang2, Hongsoo Choi1

  • 1Department of Robotics Engineering, DGIST-ETH Microrobot Research Center, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333, Techno jungang-daero, Hyeonpung-Myeon, Dalseong-Gun, Daegu, 42988, Republic of Korea.

Advanced Healthcare Materials
|September 12, 2017
PubMed
Summary

Next-generation cochlear implants (CIs) utilize artificial basilar membranes (ABMs) to mimic natural hearing. Research explores ABM frequency selectivity and energy conversion for improved hearing restoration devices.

Keywords:
artificial basilar membranescochlear implantsfrequency selectivitypiezoelectricitytriboelectricity

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Neuroscience

Background:

  • Sensorineural hearing loss impacts many patients, with cochlear implants (CIs) offering a viable treatment.
  • Conventional CIs face limitations due to extracorporeal components, necessitating advanced solutions.
  • Artificial basilar membranes (ABMs) are emerging as key components for next-generation CIs.

Purpose of the Study:

  • To review recent advancements in biomimetic artificial basilar membranes (ABMs) for next-generation cochlear implants (CIs).
  • To discuss the progress in mimicking the mechanical frequency selectivity and energy conversion of the natural basilar membrane and hair cells.

Main Methods:

  • Analysis of ABM designs focusing on trapezoidal membranes and beam arrays for frequency selectivity.
  • Review of energy conversion technologies, including piezoelectric and triboelectric materials for ABMs.
  • Examination of in vivo evaluations of ABMs in animal models based on implantation site.

Main Results:

  • Trapezoidal membranes and beam arrays demonstrate effective frequency selectivity in ABMs.
  • Various piezoelectric and triboelectric materials show promise for energy conversion in ABMs.
  • In vivo studies provide insights into the performance and implantation of ABMs in animal models.

Conclusions:

  • Biomimetic ABMs represent a significant step towards overcoming limitations of current CIs.
  • Further research and development are crucial for translating ABM technology into practical hearing devices.