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Related Concept Videos

Somatosensation01:33

Somatosensation

36.6K
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.
36.6K
Sensory Functions of the Skin01:16

Sensory Functions of the Skin

5.0K
The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
5.0K
Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

3.0K
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...
3.0K
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

296
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.
296
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

4.5K
Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
4.5K
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

962
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...
962

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Related Experiment Video

Updated: Jul 5, 2025

Fabrication of the Composite Regenerative Peripheral Nerve Interface C-RPNI in the Adult Rat
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An All-Protein Multisensory Highly Bionic Skin.

Shengyou Li1,2, Andeng Liu1, Wu Qiu3

  • 1Research Institute for Biomimetics and Soft Matter, College of Physical Science and Technology, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Xiamen University, Xiamen 361005, China.

ACS Nano
|January 23, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a silk fibroin bionic skin (SFBS) mimicking human touch receptors. This advanced material enables robots and prosthetics to sense pressure, vibrations, and textures, enhancing realism and functionality.

Keywords:
capacitive sensorselectronic skinmechanoreceptorssilk fibrointriboelectricity

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Area of Science:

  • Biomaterials Engineering
  • Robotics
  • Neuroscience

Background:

  • Realistic robots require advanced materials that mimic human skin's sensory functions.
  • Existing artificial skin technologies often lack the sensitivity and multifunctionality of biological skin.

Purpose of the Study:

  • To develop an all-protein silk fibroin bionic skin (SFBS) capable of emulating both fast-adapting (FA) and slow-adapting (SA) human skin receptors.
  • To create a versatile artificial skin with properties comparable to human skin for applications in robotics and prosthetics.

Main Methods:

  • Fabrication of mechanically distinct silk fibroin films and hydrogels to mimic epidermal and dermal layers.
  • Integration of SA and FA sensors into the SFBS structure.
  • Characterization of SFBS properties including stretchability, elasticity, modulus, biocompatibility, and degradability.
  • Testing of SFBS for static pressure sensing, high-frequency vibration detection, material discrimination, and object morphology identification.

Main Results:

  • The SFBS exhibited skin-like properties: stretchability (>140%), elasticity, low modulus (<10 kPa), biocompatibility, and degradability.
  • Demonstrated highly sensitive static pressure sensing (1.083 kPa⁻¹) both in vitro and in vivo.
  • Successfully detected high-frequency vibrations (50-400 Hz) and discriminated between different materials and sliding motions.
  • Identified fine morphological differences between objects, showcasing advanced tactile sensing capabilities.

Conclusions:

  • The developed SFBS offers a practical approach for creating advanced skin equivalents.
  • This technology has significant potential for enhancing the realism and functionality of robots, prostheses, and smart devices.
  • An SFBS-integrated rehabilitation glove demonstrated potential for restoring sensory feedback in stroke patients.