Postganglionic nerve fibers
From Wikipedia, the free encyclopedia
(Redirected from Postganglionic)
Template:Short description Template:DMCA Template:DMCA
Page Module:Infobox/styles.css has no content.
| Postganglionic nerve fibers | |
|---|---|
| Lua error in package.lua at line 80: module 'Module:InfoboxImage/data' not found. Sympathetic connections of the ciliary and superior cervical ganglia. | |
| Details | |
| Identifiers | |
| Latin | neurofibrae postganglionicae |
| Anatomical terms of neuroanatomy | |
Script error: No such module "Check for conflicting parameters".
In the autonomic nervous system, nerve fibers from the ganglion to the effector organ are called postganglionic nerve fibers.
Neurotransmitters
The neurotransmitters of postganglionic fibers differ:
- In the parasympathetic division, neurons are cholinergic. That is to say acetylcholine is the primary neurotransmitter responsible for the communication between neurons on the parasympathetic pathway.
- In the sympathetic division, neurons are mostly adrenergic (that is, epinephrine and norepinephrine function as the primary neurotransmitters). Notable exceptions to this rule include the sympathetic innervation of sweat glands and arrectores pilorum muscles where the neurotransmitter at both pre and post ganglionic synapses is acetylcholine. Another notable structure is the medulla of the adrenal gland, where chromaffin cells function as modified post-ganglionic nerves. Instead of releasing epinephrine and norepinephrine into a synaptic cleft, these cells of the adrenal medulla release the catecholamines into the blood stream as hormones.[1] Like other components of the sympathetic nervous system, all of these exceptions are still stimulated by cholinergic preganglionic fibers.
- In both divisions of the autonomic nervous system, postganglionic neurons express nicotinic acetylcholine receptors to receive signals from preganglionic neurons.[2]
See also
- Nerve fiber
- Terminal cisterna
- Rexed lamina
- Preganglionic nerve fiber
- Splanchnic nerve
- Lateral grey column
References
Page Template:Reflist/styles.css has no content.
- ^ Page Module:Citation/CS1/styles.css has no content.Noback C, Ruggiero DA, Demarest RJ, Strominger NL (2005). The Human Nervous System: Structure and Function (6th ed.). New Jersey: Humana Press. ISBN 978-1588290403.
- ^ Page Module:Citation/CS1/styles.css has no content.Costanzo, Linda (2014). BRS Physiology (6th ed.). LWW. ISBN 9781451187953.
Lua error in package.lua at line 80: module 'Module:Navbox/configuration' not found. Lua error in package.lua at line 80: module 'Module:Authority control/config' not found.
