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Related Concept Videos

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.
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...
Anatomy of the Ear01:16

Anatomy 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...
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...
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.
Equilibrium and Balance01:15

Equilibrium and Balance

The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...

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Related Experiment Video

Updated: Jun 17, 2026

Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time
09:56

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Optoacoustic induced vibrations within the inner ear.

K Y Zhang1, G I Wenzel, S Balster

  • 1Laser Center Hannover, Hollerithallee 8, 30419 Hannover, Germany. z.kaiyin@gmail.com

Optics Express
|January 7, 2010
PubMed
Summary
This summary is machine-generated.

Pulsed laser light generates optoacoustic waves in the inner ear, causing basilar membrane vibrations. This laser-induced vibration may improve cochlear implants for hearing-impaired patients.

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Area of Science:

  • Biomedical Engineering
  • Acoustics
  • Ophthalmology

Background:

  • Pulsed laser irradiation of absorbing tissue generates acoustic transients.
  • Optoacoustic wave generation is a known physical process.
  • The inner ear's potential for optoacoustic applications is unexplored.

Purpose of the Study:

  • To investigate optoacoustic wave generation in the inner ear.
  • To explore the induction of basilar membrane vibrations using laser-induced optoacoustics.
  • To assess the potential of this technology for advanced cochlear implants.

Main Methods:

  • Pulsed laser irradiation of the inner ear tissue.
  • Measurement of induced acoustic transients and basilar membrane vibrations.
  • Analysis of the correlation between laser energy, distance, and vibration characteristics.

Main Results:

  • Optoacoustic waves were successfully generated within the inner ear.
  • Laser-induced basilar membrane vibrations were observed.
  • Vibrations showed a direct correlation with laser energy and an inverse correlation with distance from the focus.

Conclusions:

  • Optoacoustic wave generation is feasible in the inner ear.
  • Laser-induced vibrations offer potential for precise cochlear activation.
  • This technique may lead to improved cochlear implants for patients with residual hearing.