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Related Concept Videos

Somatosensation01:33

Somatosensation

38.4K
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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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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Related Experiment Video

Updated: Sep 9, 2025

Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke
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Perceptual Differences between Cortical and Peripheral Stimulation Strategies for Sensory Restoration.

Brianna C Hutchison, Rohit Bose, Bronwyn J Spilker

    Medrxiv : the Preprint Server for Health Sciences
    |September 2, 2025
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    Intracortical microstimulation (ICMS) offers more natural touch sensations, while peripheral nerve stimulation (PNS) provides more reliable feedback for individuals with spinal cord injury or amputation.

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    Area of Science:

    • Neuroscience
    • Biomedical Engineering
    • Rehabilitation Science

    Background:

    • Intracortical microstimulation (ICMS) and peripheral nerve stimulation (PNS) are emerging technologies for restoring tactile sensation in individuals with physical disabilities.
    • Previous research has explored ICMS and PNS independently, lacking direct comparative studies on their perceptual characteristics.

    Purpose of the Study:

    • To directly compare the perceived sensations evoked by ICMS and PNS with natural mechanical touch.
    • To systematically evaluate the advantages and limitations of ICMS and PNS for sensory restoration.

    Main Methods:

    • A comparative study involving a participant with sensory incomplete spinal cord injury.
    • Direct comparison of sensations evoked by ICMS, PNS, and mechanical touch.
    • Analysis of perceptual variables including localization, intensity, reliability, and naturalness.

    Main Results:

    • ICMS evoked more localized and qualitatively natural sensations compared to PNS.
    • PNS elicited higher intensity and more reliable percepts than ICMS.
    • Perceived naturalness was more strongly correlated with other perceptual variables than stimulation parameters, suggesting cognitive construction.

    Conclusions:

    • ICMS may be superior for naturalistic touch during haptic exploration due to its perceptual quality.
    • PNS may be more suitable for consistent sensory feedback in closed-loop functional tasks.
    • Findings inform the development of personalized sensory neuroprostheses tailored to user needs.