(redirected from ganglions)
Also found in: Dictionary, Thesaurus, Medical.
Related to ganglions: Ganglion cyst


see nervous systemnervous system,
network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system.
..... Click the link for more information.



an anatomically isolated cluster of nerve cells (neurons), nerve fibers, and tissues, found in many invertebrates, all vertebrates, and man. In vertebrates, ganglia are located along the nerve stems.

Intervertebral ganglia, ganglia near the vertebrae, prevertebral ganglia, and ganglia enclosed in the thickness of the walls of the internal organs are topographically distinguished from each other. The intervertebral ganglia and similar ganglia are made up of sensory pseudo-unipolar neurons. Other ganglia are part of the peripheral sector of the autonomous nervous system and are mainly clusters of effector multipolar autonomous neurons, including sensory and association neurons. The clusters of neurons in each ganglion are surrounded by a layer of satellite cells, outside of which there is a thin capsule of connective tissue. Between the groups of neurons there are thicker connective tissue layers forming the connective tissue base, or stroma, of the ganglion. On the outside the ganglion is covered by a fibrous capsule, from which blood vessels reach the ganglion by way of the connective tissue layers. The synapses (nerve fibers that form the end, or terminal, contacts) lead to the bodies and branches of the autonomic neurons. In invertebrates, the ganglia arecoordinating centers carrying out the functions of a central nervous system. By means of reciprocal connections the ganglia in invertebrates form a single system that corresponds in its arrangement to the overall structure of their bodies.



A group of nerve cell bodies, usually located outside the brain and spinal cord.


1. an encapsulated collection of nerve-cell bodies, usually located outside the brain and spinal cord
2. a cystic tumour on a tendon sheath or joint capsule
References in periodicals archive ?
They further add that higher recurrence rates were most likely related to incomplete resection, which were more commonly made in ganglions over uncommon sites.
KEY WORDS: Ganglion cyst, Peroneal nerve palsy, Foot drop.
compared two methods of aspiration followed by triamcinolone injection and surgical excision for treatment of wrist ganglions.
In totally four structures, middle cervical ganglion were detected on the place where cranial and caudal branches of subclavian ansa were combined.
3) Ganglions are not neoplastic and are at no greater risk of malignancy than other tissues.
Many theories have been proposed over the years regarding the pathogenesis of ganglion formation.
A total of 60 patients with wrist ganglions were included in the study having an average age of 36.
The researchers conducted the same experiment with mice whose Grueneberg ganglions had been surgically removed.
5,6] It is widely accepted that HSV-1 resides in a latent phase in the trigeminal ganglion, having spread there by way of retrograde axonal transport from a primary infection of the lip or buccal mucosa.
Latex coloured with a red dye was injected to blood vessels of the cranial cervical ganglion and these vessels were observed with detailed dissections.
7] Though most ganglions are painless yet pain may be the chief presenting complaint.
7) Surgical excision of foot ganglion does appear to have significantly lower reoccurrence rates as compared to nonsurgical interventions, cited as 11% and 63% respectively in a comparative study of 63 ganglions.