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Related Concept Videos

Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

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The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
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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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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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What is a Sensory System?01:31

What is a Sensory System?

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Sensory systems detect stimuli—such as light and sound waves—and transduce them into neural signals that can be interpreted by the nervous system. In addition to external stimuli detected by the senses, some sensory systems detect internal stimuli—such as the proprioceptors in muscles and tendons that send feedback about limb position.
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Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

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Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming 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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Related Experiment Video

Updated: Jun 9, 2025

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
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Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

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Sensory-substitution based sound perception using a spinal computer-brain interface.

Gabriella Miklós1,2,3, László Halász1,4, Maximilian Hasslberger3

  • 1Institute of Neurosurgery and Neurointervention, Faculty of Medicine, Semmelweis University, Budapest, Hungary.

Scientific Reports
|October 22, 2024
PubMed
Summary

Spinal cord stimulation (SCS) can be repurposed as a novel auditory sensory substitution device. Patients achieved over 70% accuracy in identifying sounds using SCS, demonstrating its potential for hearing prostheses.

Keywords:
Brain–computer interfaceComputer–brain interfaceSensory substitutionSound

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Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Auditory Perception

Background:

  • Sensory substitution aims to restore lost sensory functions.
  • Spinal cord stimulation (SCS) is primarily used for chronic pain management.

Purpose of the Study:

  • To investigate the potential of SCS as a novel auditory sensory substitution device.
  • To assess the feasibility of translating sound into SCS patterns for hearing rehabilitation.

Main Methods:

  • Recruited 13 patients undergoing SCS implantation.
  • Translated everyday sound samples into personalized SCS patterns.
  • Conducted sound identification and discrimination tasks with varying stimulation bitrates.

Main Results:

  • Participants achieved 72.8% accuracy in sound identification using SCS (chance level 33.3%).
  • A weak positive correlation was found between stimulation bitrate and identification accuracy.
  • Reduced bitrates significantly impaired the discrimination of SCS patterns.

Conclusions:

  • Existing SCS technology can be utilized to create a novel neural interface for a sound prosthesis.
  • Findings support further research into enhancing stimulation fidelity and long-term training for hearing rehabilitation.