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Related Concept Videos

Cranial Part of Parasympathetic Division01:18

Cranial Part of Parasympathetic Division

2.7K
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.
The vagus nerve (cranial nerve X) alone accounts for approximately 75...
2.7K
Veins of Head and Neck01:19

Veins of Head and Neck

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The blood drainage from the head and neck is primarily managed by three pairs of veins: the external jugular, internal jugular, and vertebral veins. The external jugular veins drain superficial scalp and face structures, passing over the sternocleidomastoid muscles to empty into the subclavian veins.
On the other hand, the vertebral veins, unlike their arterial counterparts, are not primarily responsible for brain drainage. Instead, they drain the cervical vertebrae, spinal cord, and some small...
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Arteries of the Head and Neck01:26

Arteries of the Head and Neck

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The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
The internal carotid arteries supply blood to the anterior portion of the cerebrum. They enter the...
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Sympathetic Pathways: Sympathetic Chain Ganglia01:20

Sympathetic Pathways: Sympathetic Chain Ganglia

7.9K
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...
7.9K
Peripheral Nervous System: Ganglia and Nerves01:24

Peripheral Nervous System: Ganglia and Nerves

8.2K
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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Related Experiment Video

Updated: Apr 19, 2026

A Model for Perineural Invasion in Head and Neck Squamous Cell Carcinoma
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A Model for Perineural Invasion in Head and Neck Squamous Cell Carcinoma

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[Head and neck paragangliomas].

Signe Bergliot Nielsen1, Lone Sunde, Troels Bundgaard

  • 1Katrinebergvej 61, 1. tv., 8200 Aarhus N. signe_nielsen_86@yahoo.dk.

Ugeskrift for Laeger
|December 24, 2014
PubMed
Summary
This summary is machine-generated.

Head and neck paragangliomas (HNPGs) are rare neural crest tumors, mostly benign. Genetic analysis is crucial as hereditary mutations are found in 30% of patients, guiding diagnosis and counseling for affected individuals and relatives.

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Area of Science:

  • Neuro-oncology
  • Genetics
  • Endocrinology

Context:

  • Head and neck paragangliomas (HNPGs) are rare tumors originating from neural crest cells.
  • While typically benign, understanding their genetic basis is critical for management.
  • HNPGs represent a significant area of study in neurocristopathies.

Purpose:

  • To review the literature on HNPGs focusing on genetic predisposition, diagnostics, and genetic counseling.
  • To highlight the importance of identifying hereditary mutations in HNPG patients.
  • To provide guidance on genetic testing for patients and at-risk relatives.

Summary:

  • HNPGs are rare, predominantly benign tumors of neural crest origin.
  • Hereditary mutations are identified in 30% of HNPG cases, linked to specific susceptibility genes.
  • Comprehensive genetic analysis is recommended for all HNPG patients and their relatives.

Impact:

  • Improved diagnostic strategies for HNPGs through genetic screening.
  • Enhanced genetic counseling for families affected by HNPGs.
  • Potential for earlier detection and personalized management of HNPGs based on genetic findings.