ganglion

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Related to ganglia: basal ganglia, Autonomic ganglia

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 ?
1) Thirteen to twenty percent of ganglia are found on the volar aspect of the wrist, arising via a pedicle from the radio scaphoid/scapholunate interva, scaphotrapezial joint, or the metacarpotrapezial joint, in that order of frequency.
To show the possibility of such an approach basal ganglia network will be considered, and it will be modeled by spiking neural models and by a simple linear system.
The peroneal intraneural ganglia are classified by the leve of progression; ganglia occur from the tibiofibular joint (stage 0), following that they progress proximally to the articular branch (stage I), the deep peroneal nerve (stage II), the common peroneal nerve (stage III), and then spread into the sciatic nerve (stage IV).
Ultrastructural features of six types of neurons in rat dorsal root ganglia.
The MRI films were reviewed and revealed well defined abnormal signal intensity areas in basal ganglia and posterior limb of internal capsule.
The presumptive diagnosis of idiopathic basal ganglia calcification was made based on the extensive and strikingly characteristic bilateral calcifications seen on the CT.
3] voxel of interest (VOI) located within the basal ganglia and 2.
Proton (1H) MR spectroscopy (MRS) (Figures 3(a) and 3(b)) with region of interest pinpointed on the left basal ganglia lesion displayed a decrease of N-acetylaspartate (NAA) peak and lactate (Lac) doublet.
2006), sometimes second (Getty, 1975), third (Dursun, 2000) or fourth (Tecirlioglu, 1983) thoracic sympathetic ganglia and is named as cervicothoracic ganglion.
Changes in volume, including reduction, are characteristic of ganglia.
While neurotransmitters in central ganglia neurons have been described, little is known about the neuronal innervation or neurotransmitters in the pedal sole that could be involved in locomotion by muscular waves.
27 ( ANI ): Researchers aiming to find how separate small elements come together to become a unique and meaningful sequence, have found that a specific area of the brain, the basal ganglia, is implicated in a mechanism called chunking, which allows the brain to efficiently organize memories and actions.