ganglion

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ganglion:

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.
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Ganglion

 

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.

IU. I. DENISOV-NIKOL’SKII

ganglion

[′gaŋ·glē·ən]
(neuroscience)
A group of nerve cell bodies, usually located outside the brain and spinal cord.

ganglion

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 ?
Zeidenberg and colleagues (15) investigated the results and patient satisfaction of ultrasound guided aspiration of wrist ganglion cysts.
1,2,5) A recent study by Kim and Lee (13) also investigated which conditions should be considered to make a successful resection of the entire ganglion complex during open surgical excision of dorsal wrist ganglion cysts.
Wrist ganglion treatment: systematic review and meta-analysis.
compared two methods of aspiration followed by triamcinolone injection and surgical excision for treatment of wrist ganglions.
Aspiration combined with seton insertion for treatment of wrist ganglions.
Patients with a clinical diagnosis of wrist ganglion between ages 15 to 60 years and belonging to both genders were included in this study.
This study provided us a chance to compare the two most common procedures used for the treatment of wrist ganglion in our setup i.
Comparative study of two methods for treatment of dorsal wrist ganglion.
We tried to do this research and to compare the effectiveness of the two traditional methods with a newer modality treatment for dorsal wrist ganglion.
12 In a report by Gerhard et al on 38 wrist ganglion they found that aspiration and a period of observation was a better choice than hyaluronidase injection or surgery.