Preganglionic
Preganglionic
Preganglionic (pronunciation: pre-gan-glee-on-ic) is a term used in neuroscience to describe neurons that originate in the central nervous system and terminate in the autonomic ganglia. These neurons are responsible for transmitting signals from the brain to the ganglia.
Etymology
The term "preganglionic" is derived from the Latin pre meaning "before", and ganglion which is a mass of nerve tissue containing cell bodies of neurons that belong to the peripheral nervous system.
Related Terms
- Postganglionic: Refers to neurons that have cell bodies in the autonomic ganglia and send their axons to a target organ.
- Ganglion: A structure containing a number of nerve cell bodies, typically linked by synapses, and often forming a swelling on a nerve fiber.
- Neuron: The basic working unit of the brain, a specialized cell designed to transmit information to other nerve cells, muscle, or gland cells.
- Central Nervous System: The part of the nervous system which in vertebrates consists of the brain and spinal cord, to which sensory impulses are transmitted and from which motor impulses pass out, and which coordinates the activity of the entire nervous system.
- Autonomic Ganglia: Clusters of neuronal cell bodies in the peripheral nervous system that are primarily associated with the autonomic nervous system.
External links
- Medical encyclopedia article on Preganglionic
- Wikipedia's article - Preganglionic
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