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Related Concept Videos

Cranial Part of Parasympathetic Division01:18

Cranial Part of Parasympathetic Division

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...
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...
Sympathetic Pathways: Sympathetic Chain Ganglia01:20

Sympathetic Pathways: Sympathetic Chain Ganglia

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...
Arteries of the Head and Neck01:26

Arteries of the Head and Neck

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...
Cranial Nerves: Overview and Anatomy01:19

Cranial Nerves: Overview and Anatomy

The cranial nerves are an important part of the complex network of nerves in the human body. These nerves emerge directly from the brain and are responsible for transmitting essential information between the brain and various parts of the head and neck. There are 12 pairs of cranial nerves, systematically numbered using Roman numerals from I to XII, beginning from the anterior and moving to the posterior of the brain. Each cranial nerve is uniquely identified by names that reflect its function...
Veins of Head and Neck01:19

Veins of Head and Neck

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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Related Experiment Videos

[Classification of head and neck paragangliomas].

Daniel Pérez Plasencia1, R Gutiérrez Fonseca, Angel Ramos Macías

  • 1Servicio de Otorrinolaringología y Patología Cérvico-Facial, Complejo Hospitalario Universitario Insular de Las Palmas de Gran Canaria, Departamento de Cirugía, Universidad de Las Palmas de Gran Canaria, Spain. daniplasencia@yahoo.es

Acta Otorrinolaringologica Espanola
|February 28, 2009
PubMed
Summary

Paragangliomas, tumors arising from paraganglionic cells, lack a universally accepted classification. This review details key criteria, focusing on localization and surgical approaches for improved diagnosis and treatment of these neuroendocrine tumors.

Related Experiment Videos

Area of Science:

  • Endocrinology
  • Surgical Oncology
  • Pathology

Context:

  • Paragangliomas, historically termed glomus or chemodectoma, originate from paraganglionic cells.
  • Tumor classification is complex, with varied criteria including age, secretory capacity, syndromic status, and malignancy.
  • Existing classification systems lack universal acceptance.

Purpose:

  • To review and describe the most important classification criteria for paragangliomas.
  • To highlight the clinical-surgical significance of classifying paragangliomas based on localization, extension, and surgical approaches.

Summary:

  • The article emphasizes that paragangliomas are best described by their origin from paraganglionic cells.
  • It discusses diverse, yet unaccepted, classification parameters like patient age, secretory function, and tumor behavior.
  • A clinically relevant classification focuses on tumor localization, extent, and recommended surgical strategies, particularly for temporal and carotid body paragangliomas.

Impact:

  • Improved understanding of paraganglioma classification aids in refining diagnostic imaging and surgical techniques.
  • A clinically-oriented classification system enhances the management of paragangliomas.
  • Detailed descriptions of temporal and carotid body paragangliomas offer valuable insights for surgeons and clinicians.