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Related Concept Videos

Neuroplasticity01:01

Neuroplasticity

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Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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Auditory Perception01:17

Auditory Perception

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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...
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Hearing01:31

Hearing

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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.
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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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Plasticity00:58

Plasticity

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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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The Cochlea01:13

The Cochlea

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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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Related Experiment Video

Updated: Aug 5, 2025

A Method to Study Adaptation to Left-Right Reversed Audition
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Crossmodal plasticity in hearing loss.

Andrej Kral1, Anu Sharma2

  • 1Institute of AudioNeuroTechnology and Department of Experimental Otology, Otolaryngology Clinics, Hannover Medical School, Hannover, Germany; Australian Hearing Hub, School of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia.

Trends in Neurosciences
|March 29, 2023
PubMed
Summary
This summary is machine-generated.

Crossmodal plasticity in the auditory system has limits and is adaptable, not responsible for closing critical periods in deafness. This brain reorganization can be harnessed to improve hearing restoration outcomes.

Keywords:
cochlear implantsconnectivitydeafnesshearing aidsmultisensoryoscillations

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Area of Science:

  • Neuroscience
  • Auditory System Plasticity
  • Sensory Reorganization

Background:

  • Crossmodal plasticity demonstrates the brain's ability to reorganize based on sensory input.
  • The auditory system provides a model for studying the extent and limitations of this brain reorganization.

Purpose of the Study:

  • To review evidence on crossmodal plasticity in the auditory system.
  • To evaluate the role of crossmodal plasticity in deafness and critical periods.
  • To explore the potential of crossmodal plasticity for improving hearing restoration.

Main Methods:

  • Review of existing scientific literature on crossmodal plasticity in auditory and other sensory systems.
  • Analysis of evidence from both developmental and adult-onset deafness studies.
  • Evaluation of the impact of hearing restoration on crossmodal changes.

Main Results:

  • Auditory crossmodal plasticity has significant limitations, influenced by pre-existing neural circuits and top-down control.
  • Extensive reorganization is often not observed, and crossmodal plasticity does not appear to close critical periods in deafness.
  • Changes associated with hearing loss are observable even in mild cases and are reversible upon hearing restoration.

Conclusions:

  • Crossmodal plasticity is a dynamically adaptable neuronal process, not the cause of critical period closure in deafness.
  • This plasticity does not hinder the neuronal prerequisites for successful hearing restoration.
  • The adaptable nature of crossmodal plasticity offers potential for enhancing clinical outcomes in neurosensory restoration therapies.