Thoracic Splanchnic Nerves Definition
They refer to the splanchnic nerves which arise from the particular thoracic segment of the sympathetic nerves and pass inferiorly to supply sympathetic innervations to the abdomen. Such splanchnic nerves include visceral afferent and preganlionic sympathetic fibres.
Thoracic Splanchnic Nerves Types
Such nerves can be broadly classified into three main types including:
Greater Splanchnic Nerve
Such nerves pass through the diaphragm and penetrate inside the abdominal cavity, colligating the fibres at the celiac ganglia.
Lesser Splanchnic Nerve
These nerves pass inferiorly, sideways to the greater splanchnic nerves and the fibres synapse in the superior mesenteric ganglia along with their postgangolic matching part.
Least Splanchnic Nerve
Such nerves pass into the abdominal cavity. In the renal ganglia the fibres of such splanchnic nerves synapse.
Thoracic Splanchnic Nerves Anatomy
The anatomical disparity of the nerves are acquired from the medical twigs of the lower seven thoracic sympathetic ganglia. The lesser and the lower splanchnic nerves have less cranial assistance generally T11/T12, compared to the greater splanchnic nerves. The celiac plexus is a vital substitution for autonomic fibres and derives a number of thoracic splanchnic nerve fibres as it travels towards the abdominal cavity.
Thoracic Splanchnic Nerves Location
These nerves are located in the visceral portion of the thoracic sympathetic trunks.
Thoracic Splanchnic Nerves Function
The sole purpose of these fibres is to transport the sympathetic fibres to the abdominal cavity. Such nerves also carry afferent and preganglionic efferent fibres.
Thoracic Splanchnic Nerves Pictures
Take a peek at these pictures to know how these nerves appear to view.
Picture 1 – Thoracic splanchnic nerves
Picture 2 – Thoracic splanchnic nerves Image