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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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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 ?
The histologic effects of pulsed and continuous radiofrequency lesions at 42 degrees C to rat dorsal root ganglion and sciatic nerve.
The antinociceptive agent ralfinamide inhibits tetrodotoxin-resistant and tetrodotoxin-sensitive Na+ currents in dorsal root ganglion neurons.
2] asphyxiation and sciatic nerve (5 mm of the lesion site), spinal cord (specifically lumbar region), dorsal root ganglion (DRG), dorsal and ventral root were extracted and stored at -80[degrees]C till further analyse were carried out.
Effects of pulsed versus conventional radiofrequency current on rabbit dorsal root ganglion morphology.
Using a dorsal root ganglion (DRG) and dorsal horn (DH) coculture system as a model for the first sensory synapse in the CNS, we studied menthol effects on sensory synaptic transmission and the underlying mechanisms.
MOR are mainly expressed in small-diameter unmyelinated, but also in some large-diameter dorsal root ganglion neurons, and they co-localize with bradykinin B2 receptors (39-40).
Pain information enters the body through nerve endings (actually the tips of axons) in the skin or muscle and travels to a sensory neuron (Figure 1: Neuron "A") in a small bundle of nerve tissue, the dorsal root ganglion, which is attached to the spinal cord.
The Spinal Modulation System utilizes low-level electrical signals to modulate neural structures of primary sensory neurons located within the dorsal root ganglion (DRG).
Jude Medical will be able to offer radiofrequency ablation, spinal cord stimulation and dorsal root ganglion stimulation therapy solutions for the treatment of chronic pain.
Chronic depletion of mitochondrial DNA in both Schwann cells and Dorsal root ganglion neurons in vitro has resulted in decreased enzyme activities of various Krebs cycle enzymes including Malate dehydrogenase, Citrate Synthase and a simultaneous increase in Glycolytic pathway enzymes.
Subpopulations of adult frog dorsal root ganglion (DRG) neurons respond to different physiological stimuli, and have unique biophysical and pharmacological properties.
These cell bodies are grouped together next to the spinal cord in the form of the dorsal root ganglion (DRG) with intertwining, closely approximated processes.