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In vertebrate anatomy, a ganglion is a tissue mass that contains the dendrites and cell bodies (or "somas") of nerve cells, in most case ones belonging to the peripheral nervous system. Within the central nervous system such a mass is often called a nucleus. An interconnected group of ganglia is called a plexus.

There are two major groups of ganglia: spinal ganglia and autonomic ganglia. The former contains the cell bodies of sensory nerves and the latter contains the cell bodies of autonomic nerves.

In the autonomic nervous system, fibers extending from the CNS to the ganglion are known as preganglionic fibers, while those from the ganglion to the effector organ are called postganglionic fibers.

See also: nervous system, neuron, ganglion cyst

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GanglionIn vertebrate anatomy, a ganglion is a tissue mass that contains the dendrites and cell bodies (or "somas") of nerve cells, in most case ones belonging to the peripheral nervous system. Within the central nervous system such a mass is often called a nucle

Ganglion cystA ganglion cyst is a swelling that often appears on or around joints and tendons in the hand (or sometime feet). The size of the cyst can vary over time, often becoming more inflamed if irritated. It is most frequently located arond the wrist and on the f

Ganglion cellA Neuron located in the retina that receives visual information from bipolar cells; its axons give rise to the optic nerve.

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