Thoracic ganglia

The thoracic ganglia are paravertebral ganglia. The thoracic portion of the sympathetic trunk typically has 12 thoracic ganglia. Emerging from the ganglia are thoracic splanchnic nerves (the cardiopulmonary, the greater, lesser, and least splanchnic nerves) that help provide sympathetic innervation to thoracic and abdominal structures. The thoracic part of sympathetic trunk lies posterior to the costovertebral pleura and is hence not a content of the posterior mediastinum

Thoracic ganglia
Lower half of right sympathetic cord.
Details
To	Thoracic splanchnic nerves, stellate ganglion
Identifiers
Latin	ganglia thoracica
TA98	A14.3.01.024
TA2	6613
FMA	77577
Anatomical terms of neuroanatomy [edit on Wikidata]

Also, the ganglia of the thoracic sympathetic trunk have both white and gray rami communicantes. The white rami communicantes carry sympathetic fibers arising in the spinal cord into the sympathetic trunk, while the gray rami communicantes carry postganglionic nerve fibers of the sympathetic nervous system back to the spinal nerves.

Additional images

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  The thoracic aorta, viewed from the left side.
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  Sympathetic connections of the ciliary and superior cervical ganglia.