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Sympathetic Pathways: Sympathetic Chain Ganglia

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...

Cranial Part of Parasympathetic Division

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...

Muscles that Move the Head

Muscles that Move the Head

The muscles that move the head are a dynamic and complex group of structures that work together to facilitate a wide range of head movements, including rotation, flexion, extension, and lateral bending.
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...

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Updated: Jun 21, 2026

Modified Radical Neck Dissection for Cervical Metastasis

Modified Radical Neck Dissection for Cervical Metastasis

Published on: February 20, 2026

Bilateral neck paragangliomas.

N Mumoli¹, M Cei, M Pauletti

¹Department of Internal Medicine, Ospedale Civile di Livorno, 57100 Livorno, Italy. nimumoli@tiscali.it

QJM : Monthly Journal of the Association of Physicians

|July 23, 2009

Summary

This summary is machine-generated.

Head and neck paragangliomas are rare, slow-growing tumors. This case highlights the surgical risks associated with large bilateral neck paragangliomas, necessitating alternative management considerations.

Related Experiment Videos

Last Updated: Jun 21, 2026

Modified Radical Neck Dissection for Cervical Metastasis

Modified Radical Neck Dissection for Cervical Metastasis

Published on: February 20, 2026

Area of Science:

Neuro-oncology
Head and Neck Surgery
Endocrinology

Background:

Paragangliomas are rare neuroendocrine tumors originating from extra-adrenal chromaffin cells.
Head and neck paragangliomas commonly arise from carotid body, vagus nerve, or jugulotympanic regions.
These neoplasms are typically slow-growing, highly vascular, and can compress adjacent structures.

Observation:

A 62-year-old woman presented with bilateral neck paragangliomas.
The tumors were large and surgical removal was deemed excessively risky.
The patient's condition presented a complex clinical scenario due to tumor size and location.

Findings:

Surgical resection is the primary curative treatment for paragangliomas.
The significant size of the bilateral neck paragangliomas in this case posed substantial surgical risks.
Conservative management or alternative therapeutic strategies may be considered when surgery is contraindicated.

Implications:

This case underscores the challenges in managing large head and neck paragangliomas.
It emphasizes the need for careful risk-benefit assessment in surgical candidates.
Further research into less invasive treatment options for complex paraganglioma cases is warranted.