Sympathetic ganglion


Sympathetic ganglion

Infobox Anatomy
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Latin = g. sympathicum
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Caption = Autonomic nervous system innervation, showing the sympathetic (thoracolumbar) and parasympathetic (craniosacral) systems, in red and blue, respectively


Caption2 = Diagram of the course and branches of a typical intercostal nerve. (Sympathetic ganglion visible at center top.)
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DorlandsPre = g_02
DorlandsSuf = 12385047

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 on either side of the spinal cord in long chains.

Anatomy

ympathetic chain ganglia

The bilaterally symmetric sympathetic chain ganglia, also called the paravertebral ganglia, are located just ventral 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 fibre extends to an effector, typically a visceral organ in the thoracic cavity.

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.


=Additional

External links

* [http://microvet.arizona.edu/Courses/VSC401/autonomicNervous.html The Autonomic Nervous System] from the University of Arizona
* (NormanAnatomyFig|paravertebralregion)
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