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Related Concept Videos

Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

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...
Peripheral Nervous System: Ganglia and Nerves01:24

Peripheral Nervous System: Ganglia and Nerves

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.
Nerves
The nerve is a bundle of axons that serves as the communication highway in the PNS. Each nerve is ensheathed in a protective layer of connective tissue called the epineurium. This outermost layer safeguards the nerve and supports the...
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Nervous Tissue: Myelin01:25

Nervous Tissue: Myelin

The myelin sheath is a multilayered lipid and protein covering that insulates the axon of a neuron, enhancing the speed of nerve impulse conduction. Axons without this sheath are referred to as unmyelinated. Two types of neuroglia, Schwann cells in the peripheral nervous system (PNS) and oligodendrocytes in the central nervous system (CNS) are responsible for producing myelin sheaths.
Schwann cells begin to form myelin sheaths around axons during fetal development. They wrap around a small...
Nerve Supply of the GI Tract01:27

Nerve Supply of the GI Tract

The neuronal supply to the gastrointestinal (GI) tract is essential for regulating various functions, including digestion, absorption, and movement of food. This intricate network of nerves is known as the enteric nervous system (ENS), often referred to as the "second brain" of the body.
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Spinal Nerves: Plexus I

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.
The Cervical Plexus
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Related Experiment Video

Updated: Jun 28, 2026

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies
08:56

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies

Published on: October 7, 2021

MRI of peripheral nerves.

Kimberly K Amrami1, Joel P Felmlee, Robert J Spinner

  • 1Department of Radiology, Mayo Clinic, 200 1st Street SW, Rochester, MN 55905, USA. amrami.kimberly@mayo.edu

Neurosurgery Clinics of North America
|November 18, 2008
PubMed
Summary

Magnetic Resonance Imaging (MRI) is the top choice for peripheral nerve imaging. Optimized MRI accurately diagnoses nerve diseases and guides biopsies, improving diagnostic yield and reducing surgical risks.

Area of Science:

  • Neurology
  • Radiology
  • Medical Imaging

Background:

  • Magnetic Resonance Imaging (MRI) is increasingly crucial for peripheral nervous system evaluation.
  • Accurate diagnosis of peripheral nerve pathologies is essential for effective treatment.

Purpose of the Study:

  • To highlight the role of optimized MRI in diagnosing peripheral nerve diseases.
  • To emphasize MRI's capability in differentiating benign from malignant nerve conditions.
  • To discuss the application of high-resolution MRI in planning targeted biopsies.

Main Methods:

  • Review of current MRI techniques for peripheral nerve imaging.
  • Analysis of MRI's accuracy in identifying neoplastic and inflammatory nerve diseases.
  • Evaluation of high-resolution imaging for guiding fascicular biopsy.

Related Experiment Videos

Last Updated: Jun 28, 2026

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies
08:56

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies

Published on: October 7, 2021

Main Results:

  • Optimized MRI provides high accuracy in diagnosing peripheral nerve disorders.
  • MRI effectively distinguishes between benign and malignant nerve lesions.
  • High-resolution MRI facilitates precise planning for diagnostic nerve biopsies.

Conclusions:

  • MRI is the preferred modality for peripheral nervous system imaging.
  • Customized MRI protocols enhance diagnostic capabilities for nerve pathologies.
  • Advanced MRI techniques improve the safety and efficacy of nerve biopsy procedures.