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Related Concept Videos

Cranial Part of Parasympathetic Division01:18

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The cranial part of the parasympathetic division plays a crucial role in regulating the visceral functions of the head and specific structures in the neck, thoracic, and abdominopelvic cavities. Preganglionic fibers of the parasympathetic division exit the brain through cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus), delivering parasympathetic output to the respective visceral structures.
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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 sympathetic pathways of the collateral ganglia and adrenal medulla serve unique but interconnected roles in the sympathetic response.
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Ganglionic blockers inhibit autonomic activity by blocking nicotinic receptors in the autonomic ganglia, suppressing impulse transmission. These blockers lack selectivity between sympathetic and parasympathetic ganglia and are ineffective as neuromuscular junction antagonists. They can be categorized into two groups:
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Esophageal varices are dilated, tortuous veins which are found mainly in the submucosa of the lower esophagus but which may also appear higher up or extend into the stomach. They develop due to increased pressure in the portal venous system, often as a result of liver cirrhosis. This condition scars and damages the liver, impeding normal blood flow through the portal vein. To compensate, blood seeks alternative pathways, forming fragile new vessels (varices) in the esophagus and stomach. These...
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Sympathetic Pathways: Sympathetic Chain Ganglia01:20

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The sympathetic chain ganglia, also known as the sympathetic trunk ganglia or paravertebral ganglia, are a series of ganglia located bilaterally on either side of the spinal column. These ganglia serve as relay stations for the sympathetic nervous system. Preganglionic neurons originating in the spinal cord project their axons to the sympathetic chain ganglia. Within the ganglia, these preganglionic fibers synapse with postganglionic neurons.The postganglionic neurons of the sympathetic trunk...
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Updated: Aug 7, 2025

A Unified Methodological Framework for Vestibular Schwannoma Research
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Vagal paragangliomas.

Lena Mottie1, Jeroen Meulemans1,2, Vincent Vander Poorten1,2

  • 1Otorhinolaryngology-Head and Neck Surgery, University Hospitals Leuven.

Current Opinion in Otolaryngology & Head and Neck Surgery
|March 13, 2023
PubMed
Summary
This summary is machine-generated.

Vagal paragangliomas are rare head and neck tumors. Management requires a multidisciplinary team, considering tumor growth, patient factors, and metabolic activity for tailored treatment strategies.

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Area of Science:

  • Head and Neck Oncology
  • Neuro-oncology
  • Surgical Pathology

Background:

  • Vagal paragangliomas are rare neuroendocrine tumors originating from the vagus nerve.
  • Their anatomical location presents significant diagnostic and therapeutic challenges due to proximity to critical structures.
  • The diagnostic and management approaches for these tumors are continuously evolving.

Approach:

  • This review provides an updated overview of the clinical presentation of vagal paragangliomas.
  • It details the current state-of-the-art diagnostic workup, including imaging and biochemical tests.
  • The article discusses contemporary management strategies, encompassing surgical and non-surgical options.

Key Points:

  • Multidisciplinary team evaluation is crucial for all suspected cases.
  • Management decisions depend on tumor growth rate, patient age and fitness, cranial nerve involvement, and tumor metabolic activity.
  • An evidence-based algorithm is presented to guide clinical decision-making.

Conclusions:

  • Individualized treatment plans are essential for optimal outcomes in vagal paraganglioma management.
  • The evolving understanding of these tumors necessitates ongoing research and refinement of therapeutic strategies.
  • Early and accurate diagnosis, coupled with a tailored approach, improves patient prognosis.