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Related Concept Videos

Somatosensation01:33

Somatosensation

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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The Cochlea01:13

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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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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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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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Equilibrium and Balance01:15

Equilibrium and Balance

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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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The Vestibular System01:29

The Vestibular System

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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.
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Related Experiment Video

Updated: Jun 30, 2025

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
07:32

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Published on: September 1, 2016

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The auditory midbrain mediates tactile vibration sensing.

Erica L Huey, Josef Turecek, Michelle M Delisle

    Biorxiv : the Preprint Server for Biology
    |March 18, 2024
    PubMed
    Summary
    This summary is machine-generated.

    Mammals process body vibrations using Pacinian corpuscles and auditory pathways. The midbrain

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    Related Experiment Videos

    Last Updated: Jun 30, 2025

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    Area of Science:

    • Neuroscience
    • Sensory Biology
    • Auditory System

    Background:

    • Mammals detect environmental vibrations via skin mechanoreceptors (somatosensory system) and airborne sound (auditory system).
    • Pacinian corpuscles uniquely detect high-frequency (40-1000 Hz) mechanical vibrations.
    • The brain's processing of tactile and auditory information integration is crucial for sensory perception.

    Approach:

    • Investigated the role of the lateral cortex of the inferior colliculus (LCIC) in processing high-frequency vibrations.
    • Examined neural responses in the LCIC to both mechanical vibration and auditory stimuli.
    • Assessed the necessity of the LCIC for behavioral responses to vibrations.

    Key Points:

    • Pacinian corpuscle neurons prominently encode high-frequency mechanical vibrations in the LCIC.
    • LCIC neurons receive convergent input from both Pacinian corpuscles and the auditory system.
    • Coincident tactile-auditory stimulation elicits stronger responses in LCIC neurons than unimodal stimulation.
    • The LCIC is essential for behavioral responses to high-frequency mechanical vibrations.

    Conclusions:

    • The auditory midbrain (LCIC) plays a critical role in encoding body-borne vibrations.
    • Convergent processing of tactile and auditory information in the LCIC integrates sensory input.
    • This integration in the LCIC mediates behavioral responses to environmental vibrations.