Ganglia provide relay points and intermediary connections between different neurological structures in the body, such as the peripheral and central nervous systems.
Ganglia are ovoid structures containing cell bodies of neurons and glial cells supported by connective tissue. Ganglia function like relay stations - one nerve enters and an other exits.
Treatment
- Immobilization. Because activity can cause the ganglion cyst to get larger, it may help to temporarily immobilize the area with a brace or splint.
- Aspiration. In this procedure, your doctor uses a needle to drain the fluid from the cyst.
- Surgery. This may be an option if other approaches haven't worked.
Ganglion cysts are the most common mass or lump in the hand. They are not cancerous and, in most cases, are harmless. They occur in various locations, but most frequently develop on the back of the wrist. These fluid-filled cysts can quickly appear, disappear, and change size.
ganglion - a collection of cell bodies located outside the Central Nervous System. nerve - a group of fibers (axons) outside the CNS. The spinal nerves contain the fibers of the sensory and motor neurons. A nerve does not contain cell bodies.
What causes ganglion cysts? A ganglion cyst starts when the fluid leaks out of a joint or tendon tunnel and forms a swelling beneath the skin. The cause of the leak is generally unknown, but may be due to trauma or underlying arthritis.
Ganglion cells are the projection neurons of the vertebrate retina, conveying information from other retinal neurons to the rest of the brain. Their axons run in a separate layer on the inner surface of the retina, collect at the optic disk, and then exit the eye as the optic nerve.
The prevertebral ganglia lie ventral to the aorta and are named for the vessels near which they lie; thus they are called celiac, superior mesenteric, and inferior mesenteric ganglia.
The superior cervical ganglia are involved in the autonomic nervous system. They are involved explicitly with sympathetic efferent innervation, particularly to the face and head. The superior cervical ganglion is the most superior ganglion of the sympathetic chain, bilaterally.
The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
In neuroanatomy, the
cranial nerve ganglia are
ganglia of certain
cranial nerves. They can be parasympathetic or sensory. All
cranial nerve ganglia are bilateral.
The four cranial parasympathetic ganglia are:
- ciliary ganglion.
- pterygopalatine ganglion.
- otic ganglion.
- submandibular ganglion.
a cluster of cell bodies in the dorsal root of a spinal nerve. The dorsal root ganglia contain cell bodies for sensory nerves that carry sensory information to the spinal cord.
the aggregation of nerve cells, or neurons, in the nervous system that continuously participate in the execution of reflexes and in the regulation of a particular function or some aspect of that function. The simplest nerve center consists of a few neurons that constitute an isolated ganglion.
(Entry 1 of 2) 1 : sinew, tendon strain every nerve. 2 : any of the filamentous bands of nervous tissue that connect parts of the nervous system with the other organs, conduct nerve impulses, and are made up of axons and dendrites together with protective and supportive structures.
Each neuron in your brain has one long cable that snakes away from the main part of the cell. This cable, several times thinner than a human hair, is called an axon, and it is where electrical impulses from the neuron travel away to be received by other neurons.
In many cases, ganglion cysts go away by themselves without the need for medical treatment. Treatment options include surgery or draining the cyst with a needle.
