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Related Concept Videos

Peripheral Nervous System: Ganglia and Nerves01:24

Peripheral Nervous System: Ganglia and Nerves

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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.
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...
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Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

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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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Peripheral Artery Disease IV: Nursing Management01:26

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 The nursing management of a patient with peripheral artery disease (PAD) begins with a thorough assessment of the patient’s health history and clinical manifestations.AssessmentHealth History: Evaluate the patient’s history of hypertension, hyperlipidemia, family history of cardiovascular issues, and lifestyle factors such as dietary patterns, smoking, and physical activity.Physical Examination:Assess the affected extremity for decreased or absent peripheral pulses,...
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Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

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Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
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Neurogenesis and Regeneration of Nervous Tissue01:15

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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
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Peripheral Artery Disease V: Postoperative Nursing Management01:23

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During the postoperative period, it is crucial to focus on maintaining circulation, identifying and managing potential complications, and planning for discharge.Nursing AssessmentVital signs monitoring: Regularly monitor vital signs, including blood pressure, heart rate, respiratory rate, and temperature, to detect early signs of complications such as bleeding and infection.Circulation assessment: Monitor pulses, perform Doppler assessments, and check capillary refill, color, temperature, and...
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Related Experiment Video

Updated: Sep 17, 2025

Traumatic Peripheral Nerve Injury in Mice
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Classification of Peripheral Nerve Injury.

Jenifer Pitman1, Laura M Fayad1, Mona Dabiri1

  • 1The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins School of Medicine, Baltimore, MD, USA.

Magnetic Resonance Imaging Clinics of North America
|July 3, 2025
PubMed
Summary

MR neurography (MRN) is crucial for diagnosing peripheral nerve injuries (PNIs). This imaging technique helps determine if injuries need surgery or will heal spontaneously, optimizing patient care.

Keywords:
MR neurography (MRN)Peripheral nerve injuries (PNI)Skeletal muscle denervation

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Area of Science:

  • Radiology
  • Neurology
  • Orthopedic Surgery

Background:

  • Peripheral nerve injuries (PNIs) pose significant diagnostic and management challenges.
  • Accurate assessment is vital for differentiating between injuries requiring surgical intervention and those with potential for spontaneous recovery.

Purpose of the Study:

  • To review the critical role of MR neurography (MRN) in diagnosing and managing PNIs.
  • To highlight MRN's utility in classifying injury severity and guiding treatment decisions.

Main Methods:

  • Review of current literature on MR neurography applications in peripheral nerve injuries.
  • Discussion of classification systems correlating imaging findings with electrodiagnostic grading.

Main Results:

  • MR neurography effectively differentiates between injuries requiring surgery and those likely to heal spontaneously.
  • MRN assesses skeletal muscle denervation and distinguishes pre-ganglionic from post-ganglionic traumatic injuries.
  • Imaging findings correlate with established electrodiagnostic grading systems.

Conclusions:

  • MR neurography is an integral tool for optimizing the care of patients with PNIs.
  • It provides critical information for surgical planning and non-surgical management strategies.