Preganglionic fibers

From Wikipedia, the free encyclopedia

Nerve: Preganglionic fibers
Autonomic nervous system innervation, showing the sympathetic and parasympathetic (craniosacral) systems, in red and blue, respectively
Latin	neurofibrae postganglionicae
Dorlands / Elsevier	n_06/12568789

In the autonomic nervous system, fibers from the CNS to the ganglion are known as preganglionic fibers.

All preganglionic fibers, whether they are in the sympathetic division or in the parasympathetic division, are cholinergic (that is, these fibers use acetylcholine as their neurotransmitter).

Sympathetic preganglionic fibers tend to be shorter than parasympathetic preganglionic fibers because sympathetic ganglia are often closer to the spinal cord than are the parasympathetic ganglia.

[edit] See also

• Postganglionic fibers

[edit] External links

• Diagram at tmc.edu
• Diagram at bham.ac.uk
• Diagram at uwaterloo.ca

v • d • e Nerves - autonomic nervous system (sympathetic nervous system/ganglion/trunks and parasympathetic nervous system/ganglion) Head/cranial Ciliary ganglion: roots (Sensory, Parasympathetic, Sympathetic) - Short ciliary Pterygopalatine ganglion: deep petrosal - nerve of pterygoid canal branches of distribution: greater palatine (inferior posterior nasal branches) - lesser palatine - nasopalatine (medial superior posterior nasal branches) - pharyngeal Submandibular ganglion Otic ganglion Neck/cervical paravertebral ganglia: Cervical ganglia (Superior, Middle, Inferior) - Stellate ganglion prevertebral plexus: Cavernous plexus - Internal carotid Chest/thorax paravertebral ganglia: Thoracic ganglia prevertebral plexus: Cardiac plexus - Esophageal plexus - Pulmonary plexus - Thoracic aortic plexus splanchnic nerves: cardiopulmonary - thoracic cardiac nerves: Superior - Middle - Inferior Abdomen/Lumbar paravertebral ganglia: Lumbar ganglia prevertebral ganglia: Celiac ganglia (Aorticorenal) - Superior mesenteric ganglion - Inferior mesenteric ganglion prevertebral plexus: Celiac plexus - (Hepatic, Splenic, Pancreatic) - aorticorenal (Abdominal aortic plexus, Renal/Suprarenal) - Superior mesenteric (Gastric) - Inferior mesenteric (Spermatic, Ovarian) - Superior hypogastric (hypogastric nerve, Superior rectal) - Inferior hypogastric (Vesical, Prostatic/Cavernous nerves of penis, Uterovaginal, Middle rectal) splanchnic nerves: Lumbar splanchnic nerves enteric nervous system: Meissner's plexus • Auerbach's plexus Pelvis/sacral paravertebral ganglia: Sacral ganglia - Ganglion impar splanchnic nerves: Pelvic splanchnic nerves - Sacral splanchnic nerves All Rami communicans (White, Gray) - Preganglionic fibers - Postganglionic fibers