ganglion

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Related to dorsal root ganglion: Spinal nerves

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 ?
Effects of pulsed versus conventional radiofrequency current on rabbit dorsal root ganglion morphology.
The histologic effects of pulsed and continues radiofrequency lesions at 42 degrees C to rat dorsal root ganglion and sciatic nerve.
The efficacy of radiofrequency lesioning of the cervical spinal dorsal root ganglion in a double-blinded, randomized study: no difference between 40 degrees C and 67 degrees C treatments.
Timothy Deer will close the session by presenting the results of the Spinal Modulation Dorsal Root Ganglion Pilot Trial.
The dermatomal and myotomal association in these patients suggests direct diffusion of the virus from the dorsal root ganglions to the anterior horn cells (9).