The cochleovestibular system/ototoxicity/clinical issues

A Shulman1

  • 1Martha Entenmann Tinnitus Research Center, Health Science Center at Brooklyn, State University of New York 11203, USA. metrc@inch.com

Insights

Basic science research on ototoxicity should inform clinical strategies for hearing loss and tinnitus. Understanding neurochemical mechanisms may reveal common pathways for ototoxicity and related symptoms like vertigo and stress.

Area of Science:

  • Ototoxicology
  • Neuroscience
  • Audiology
  • Vestibulogy

Background:

  • Ototoxicity, damage to the inner ear, can cause hearing loss, tinnitus, and vertigo.
  • Basic science research provides insights into the mechanisms of ototoxicity.
  • Clinical strategies for managing cochleovestibular complaints are needed.

Purpose of the Study:

  • To apply basic science findings on ototoxicity to clinical practice.
  • To develop targeted treatments for hearing loss, tinnitus, and vertigo.
  • To explore the neurochemical basis of ototoxicity and its clinical manifestations.

Main Methods:

  • Review of basic science research on ototoxicity.
  • Analysis of clinical manifestations of cochleovestibular complaints.
  • Consideration of neurochemical mechanisms of neuroprotection and apoptosis.

Main Results:

  • Ototoxicity research can guide the development of clinical strategies.
  • A common neurochemical basis for ototoxicity is hypothesized.
  • Ototoxicity is linked to sensory complaints and potentially stress and neuropsychiatric disorders.

Conclusions:

  • Clinical strategies for ototoxicity should integrate basic science knowledge.
  • Further investigation into neurochemical mechanisms is recommended.
  • Ototoxicity impacts hearing, balance, and potentially mental well-being.

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.
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.
The Vestibular System01:29

The Vestibular System

The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
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...
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...
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...