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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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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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Related Experiment Video

Updated: Oct 20, 2025

Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology
13:58

Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology

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Spatial modeling of epidermal nerve fiber patterns.

Konstantinos Konstantinou1,2, Aila Särkkä1,2

  • 1Department of Mathematical Sciences, Chalmers University of Technology, Gothenburg, Sweden.

Statistics in Medicine
|September 15, 2021
PubMed
Summary

Diabetic neuropathy alters epidermal nerve fiber (ENF) structure. Analyzing 3D nerve branching patterns reveals changes in later nerve parts, aiding early detection of peripheral neuropathy.

Keywords:
branching pointcompetitionend pointepidermal active territorypoint processtwo-step model

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Three-dimensional Imaging of Nociceptive Intraepidermal Nerve Fibers in Human Skin Biopsies
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Three-dimensional Imaging of Nociceptive Intraepidermal Nerve Fibers in Human Skin Biopsies

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Area of Science:

  • Neuroscience
  • Biophysics
  • Mathematical Biology

Background:

  • Peripheral neuropathy is characterized by reduced epidermal nerve fiber (ENF) counts and increased spatial clustering.
  • Understanding the spatial structure of ENFs is crucial for elucidating the mechanisms behind these morphological changes in neuropathy.

Purpose of the Study:

  • To compare ENF patterns in healthy controls versus individuals with mild diabetic neuropathy.
  • To develop and apply a model for analyzing the 3D spatial structure of ENFs, including branching points.

Main Methods:

  • Utilized suction skin blister specimens from the foot.
  • Developed a 3D spatial point process model incorporating nerve base, end, and first branching points.
  • Employed spatial summary statistics and introduced a novel epidermal active territory metric.

Main Results:

  • The study successfully modeled both 2D and 3D ENF patterns, including branching points.
  • Competitive interactions between individual nerves were investigated.
  • Changes in ENF spatial structure were found to be more readily detectable in the distal portions of the nerve fibers.

Conclusions:

  • The 3D modeling approach provides enhanced insights into ENF spatial organization.
  • Detecting alterations in the later segments of ENFs may serve as an early indicator for peripheral neuropathy, particularly diabetic neuropathy.