Thoracic splanchnic nerves
Thoracic Splanchnic Nerves – Definition
These are splanchnic nerves originating from the specific thoracic section of the sympathetic nerves and travelling inferiorly to provide the abdomen with sympathetic innervations. Preganlionic sympathetic fibers and visceral afferent sympathetic fibers are two major splanchnic nerves of this type.
Thoracic Splanchnic Nerves - Types
These nerves can be broadly categorized into the following three major types:
Greater Splanchnic Nerves
They move through the diaphragm and get through the abdominal cavity. The nerves join the fibers at the celiac ganglia.
Lesser Splanchnic Nerve
These pass sideways and inferiorly to the greater splanchnic nerves. The fibers synapse in the superior mesenteric ganglia along with their corresponding postgangolic section.
Least Splanchnic Nerve
These move into the abdominal cavity. The fibers of these nerves have a junction in the renal ganglia.
Thoracic Splanchnic Nerves – Anatomy
The greater splanchnic nerves have more cranial assistance than the lower ones, usually T11/T12. The celiac plexus derives various thoracic splanchnic nerve fibers while moving towards the abdominal cavity.
Thoracic Splanchnic Nerves - Location
These can be found in the visceral part of the thoracic sympathetic trunks.
Thoracic Splanchnic Nerves - Functions
These nerve fibers transport the sympathetic fibers to the abdominal cavity and also carry the afferent and preganglionic efferent fibers.
Thoracic Splanchnic Nerves - Pictures
Find out from these images how these endocrine structures look like.
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