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Related Concept Videos

Auditory Perception01:17

Auditory Perception

325
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...
325
Equilibrium and Balance01:15

Equilibrium and Balance

4.6K
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...
4.6K
Auditory Pathway01:15

Auditory Pathway

5.3K
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...
5.3K
The Vestibular System01:29

The Vestibular System

39.5K
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.
39.5K
Hearing01:31

Hearing

52.0K
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.
52.0K
The Cochlea01:13

The Cochlea

44.7K
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.
44.7K

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Related Experiment Video

Updated: Jun 15, 2025

Author Spotlight: Exploring the Effects of Transauricular Vagus Nerve Stimulation
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Author Spotlight: Exploring the Effects of Transauricular Vagus Nerve Stimulation

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Auricular neuromodulation may act through interoception modulation.

Frédéric Canini1, Damien Claverie2, Florence Weill3

  • 1Laboratoire Inter-universitaire de Psychologie, Personnalité, Cognition, Changement Social (LIP/PC2S), Savoie-Mont-Blanc University and Grenoble-Alpes University, Chambéry, France.

Brain Research
|June 1, 2025
PubMed
Summary

Auricular neuromodulation (ANM) may improve body-brain interactions by modulating interoception, the awareness of internal sensations. This non-invasive technique influences the autonomic nervous system and stress response, offering potential benefits for various conditions.

Keywords:
AnxietyAuricular neuromodulationInteroceptionPainStressSympathetic nerveVagal nerve

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Area of Science:

  • Neuroscience
  • Physiology
  • Medical Technology

Background:

  • Auricular neuromodulation (ANM) is a non-invasive technique stimulating nerves in the outer ear.
  • ANM, particularly vagal nerve stimulation, shows promise for treating pain and anxiety.
  • The precise mechanisms underlying ANM's therapeutic effects require further investigation.

Purpose of the Study:

  • To investigate the hypothesis that ANM modulates interoception, influencing body-brain interactions.
  • To define an auricle-brain axis and elucidate the pathways involved in ANM's effects.
  • To explore ANM's potential in treating interoception-related pathologies.

Main Methods:

  • Review of anatomical, physiological, and pathophysiological evidence linking ANM and interoception.
  • Proposal of two functional pathways activated by auricular nerves.
  • Assessment of ANM's effects on interoception and related pathologies.

Main Results:

  • ANM is proposed to modulate interoception via two distinct neural pathways.
  • ANM influences the autonomic nervous system and stress response, key outputs of interoception.
  • The study suggests ANM may improve body-brain communication compromised in certain diseases.

Conclusions:

  • ANM potentially enhances interoception by providing novel sensory input.
  • This modulation can lead to improved regulation of the autonomic nervous system and stress response.
  • ANM offers a promising non-invasive approach for conditions linked to disrupted interoception.