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Sympathetic ganglion
Autonomic nervous system innervation, showing the sympathetic and parasympathetic (craniosacral) systems, in red and blue, respectively
Latin	g. sympathicum
Gray's	subject #
System
MeSH	[1]
Diagram of the course and branches of a typical intercostal nerve. (Sympathetic ganglion visible at center top.)

Sympathetic ganglia are the ganglia of the sympathetic nervous system. They deliver information to the body about stress and impending danger, and are responsible for the familiar fight-or-flight response. They contain approximately 20000–30000 nerve cell bodies and are located close to and either side of the spinal cord in long chains.

Contents 1 Anatomy 1.1 Sympathetic chain ganglia 1.2 Collateral ganglia 2 Additional images 3 External links

[edit] Anatomy

[edit] Sympathetic chain ganglia

The bilaterally symmetric sympathetic chain ganglia, also called the paravertebral ganglia, are located just anterior and lateral to the spinal cord. The chain extends from the upper neck down to the coccyx, forming the unpaired coccygeal ganglion. Preganglionic nerves from the spinal cord synapse at one of the chain ganglia and the postganglionic fiber extends to an effector, typically a visceral organ in the thoracic cavity.

[edit] Collateral ganglia

Neurons of the collateral ganglia, also called the prevertebral ganglia, receive input from the splanchnic nerves and innervate organs of the abdominal and pelvic region. These include the celiac ganglia, superior mesenteric ganglia, and inferior mesenteric ganglia.

[edit] Additional images

Scheme showing structure of a typical spinal nerve.

Transverse section of human embryo eight and a half to nine weeks old.

[edit] External links

• The Autonomic Nervous System from the University of Arizona
• Norman/Georgetown thoraxlesson5 (paravertebralregion)
• Dictionary at eMedicine Sympathetic+ganglia

This box: view • talk • edit Nerves - autonomic nervous system

sympathetic nervous system and parasympathetic nervous system HEAD/parasympathetic ganglion: ciliary ganglion (short ciliary nerves) - pterygopalatine ganglion (nerve of pterygoid canal) - submandibular ganglion - otic ganglion NECK: cavernous plexus - cervical ganglia: (superior, middle, inferior), stellate ganglion, internal carotid THORAX: thoracic splanchnic nerves, cardiac plexus, superior cardiac nerve, middle cardiac nerve, inferior cardiac nerve sympathetic trunks (white ramus communicans, gray ramus communicans) - collateral ganglia - sympathetic ganglion ABDOMEN: inferior mesenteric - hepatic - splenic - gastric - pancreatic - suprarenal hypogastric: superior hypogastric - inferior hypogastric - vesical - prostatic - uterovaginal, lumbar splanchnic, sacral splanchnic, celiac: celiac ganglia - aorticorenal - renal - spermatic/ovarian - superior mesenteric - aortic plexus Enteric nervous system: Meissner's plexus • Auerbach's plexus PELVIS: ganglion impar, pelvic splanchnic

This page uses content from the English-language version of Wikipedia. The original article was at Sympathetic ganglion. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.