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Peripheral Nervous System: Ganglia and Nerves01:24

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The Peripheral Nervous System (PNS) is a crucial component of the body's neural network, extending beyond the central nervous system (CNS) to bridge the gap between the CNS and the external environment. It encompasses nerves, ganglia, and sensory receptors.
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The plexuses of the lower body include the lumbar, sacral, and coccygeal plexuses, which innervate the abdomen, pelvis, legs, and coccygeal region. These plexuses control the transmission of sensory information and coordinate motor functions of the lower body.
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Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
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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.
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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.
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Spinal Nerves: Plexus I01:22

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Nerve plexuses are networks of interlacing nerves that serve as communication hubs to distribute and organize nerve action across various body regions. The nerve plexuses are organized into the cervical plexus located in the neck region, brachial plexus in the shoulder area, lumbar plexus found in the lower back, sacral plexus situated in the pelvis, and coccygeal plexus located in the coccygeal region.
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Updated: Nov 12, 2025

Fabrication of the Composite Regenerative Peripheral Nerve Interface C-RPNI in the Adult Rat
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Compliant peripheral nerve interfaces.

Valentina Paggi1,2, Outman Akouissi1,3,2, Silvestro Micera3,4,2

  • 1Bertarelli Foundation Chair in Neuroprosthetic Technology, Laboratory for Soft Bioelectronic Interfaces, Institute of Microengineering, Institute of Bioengineering, Centre for Neuroprosthetics, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1202 Geneva, Switzerland.

Journal of Neural Engineering
|March 22, 2021
PubMed
Summary
This summary is machine-generated.

Flexible peripheral nerve interfaces (PNIs) offer improved biocompatibility for long-term neural recording and modulation. Research focuses on advanced materials and designs to overcome challenges in implantable neural technologies.

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Materials Science

Background:

  • Peripheral nerve interfaces (PNIs) are crucial for recording/modulating neural activity in the central and peripheral nervous systems.
  • Applications include neuroprosthetics, pain management, and restoring vital functions, with implantable PNIs offering enhanced selectivity.
  • Long-term functionality of implantable PNIs is hindered by tissue damage at the implant-tissue interface, influenced by material properties and design.

Purpose of the Study:

  • To review recent advancements in flexible and implantable peripheral nerve interfaces.
  • To highlight promising material selection, fabrication methods, and integrated functions for PNIs.
  • To discuss challenges in integrating PNI systems on compliant substrates.

Main Methods:

  • Review of current literature on flexible and implantable PNIs.
  • Analysis of various interface designs: intraneural, extraneural, and regenerative.
  • Examination of different modulation techniques: electrical, optical, and chemical.

Main Results:

  • Development of mechanically compliant PNIs that adapt to nerve anatomy and movement, reducing foreign body response.
  • Promising solutions in materials selection, fabrication techniques, and integrated functionalities for enhanced PNI performance.
  • Identification of key challenges in achieving seamless integration of PNIs on flexible substrates.

Conclusions:

  • Mechanically compliant PNIs represent a significant step towards overcoming the limitations of current implantable neural interfaces.
  • Continued research in materials, fabrication, and design is essential for the successful clinical translation of advanced PNIs.
  • Addressing integration challenges on compliant substrates will be critical for future PNI development.