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Related Concept Videos

Hair Cells01:22

Hair 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.
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...
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...
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 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...

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Related Experiment Video

Updated: May 8, 2026

Bottom-up and Shotgun Proteomics to Identify a Comprehensive Cochlear Proteome
14:23

Bottom-up and Shotgun Proteomics to Identify a Comprehensive Cochlear Proteome

Published on: March 7, 2014

Usher proteins in inner ear structure and function.

Zubair M Ahmed1, Gregory I Frolenkov, Saima Riazuddin

  • 1Division of Pediatric Ophthalmology, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Ohio;

Physiological Genomics
|September 12, 2013
PubMed
Summary
This summary is machine-generated.

Usher syndrome (USH) disrupts hearing and vision by affecting inner ear hair cells. Understanding USH proteins in stereocilia is key to deciphering sound transduction mechanisms.

Keywords:
CIB2Usher syndromecalcium bufferinner earretinitis pigmentosa

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Area of Science:

  • Neuroscience
  • Genetics
  • Otolaryngology

Background:

  • Usher syndrome (USH) is a significant neurosensory disorder impacting human hearing and vision.
  • Research into USH has elucidated the molecular underpinnings of hearing mechanisms.

Purpose of the Study:

  • To investigate the crucial role of Usher syndrome proteins in the function of inner ear hair cells.
  • To understand the precise mechanisms of mechano-electrical transduction (MET) by studying USH proteins in stereocilia.

Main Methods:

  • Leveraging linkage studies in families with Usher syndrome.
  • Conducting animal studies to model the disorder.
  • Characterizing purified Usher syndrome proteins.

Main Results:

  • Eleven Usher syndrome proteins have been identified to date.
  • Evidence indicates all identified USH proteins are vital for hair cell function.
  • Most USH proteins are localized to stereocilia, the site of sound vibration transduction.

Conclusions:

  • Elucidating the functions of USH proteins within stereocilia is essential for understanding MET.
  • Further research into USH protein function is critical for advancing knowledge of hearing mechanisms and Usher syndrome.