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Related Concept Videos

Somatosensation01:33

Somatosensation

38.5K
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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Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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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 16, 2025

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

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Exploring Synergy Between Tactile Perception and Arm Usage.

Yuhe Chen, Jonathan van Zanten, Michael Wiertlewski

    IEEE ... International Conference on Rehabilitation Robotics : [Proceedings]
    |July 11, 2025
    PubMed
    Summary
    This summary is machine-generated.

    Tactile stimulation significantly impacts grasping force adaptation in healthy adults. However, arm usage did not show a significant synergy with tactile perception, providing insights for stroke rehabilitation.

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    Area of Science:

    • Neuroscience
    • Biomechanics
    • Rehabilitation Science

    Background:

    • Stroke frequently causes tactile deficiencies, impairing motor control for tasks like grasping.
    • Understanding the neuromuscular basis of tactile deficits is key for effective stroke rehabilitation.
    • Previous research explored grasping and arm muscle activation post-stroke, but the synergy between tactile perception and arm use remains unclear.

    Purpose of the Study:

    • To investigate the neuromuscular synergy between tactile perception and arm usage in a controlled environment.
    • To establish a baseline for future studies on stroke patients by testing healthy adults.
    • To validate a novel experimental platform for studying human tactile behaviors.

    Main Methods:

    • Developed a comprehensive experimental platform with a lever arm and ultrasonic friction modulation.
    • Tested 12 healthy adults under varying friction levels and arm usage conditions.
    • Measured grasping force adaptation and reflex delay to assess neuromuscular responses.

    Main Results:

    • Tactile stimulation significantly affected grasping force adaptation in 8 out of 12 conditions (p<0.05).
    • Arm usage did not demonstrate significant synergy with tactile perception in grasping force adaptation (p=0.44) or reflex delay (p=0.73).
    • The experimental platform effectively simulated controlled grasping tasks and provided insights into tactile behaviors.

    Conclusions:

    • Tactile sensory input plays a significant role in modulating grasping force.
    • Arm usage does not appear to synergize with tactile perception in the tested motor control tasks.
    • The findings provide a foundation for future research into stroke-related tactile deficits and rehabilitation strategies.