ganglion

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Related to thoracic ganglion: thoracic nerve, cervical ganglion, sacral ganglion

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 ?
Western blot analysis was carried out on protein samples from the optic ganglion, brain ganglion, thoracic ganglion, and muscle.
The thoracic ganglion is a part of the thoracic ganglion mass, which also includes the subesophageal ganglion and abdominal ganglion.
These intrathoracic branches join the gray communicating vessels of the sympathetic fibers and arise from the second sympathetic thoracic ganglion and probably from the ganglion at T3.
The flexion-induced responses were recorded from the dorsal nerve of the 3rd nerve root of the 6th thoracic ganglion with a tungsten hook electrode insulated by addition of mineral oil.
The 3rd nerve root of each thoracic ganglion branches complexly: the dorsal nerve in this 3rd root provides a common pathway both for the central projection of the axons of stretch receptor cells and for efferents to the extensor muscle (Fig.