What is a splanchnic nerve?

The splanchnic nerves are paired, autonomic nerves that carry both visceral sympathetic and sensory fibers, except for the pelvic splanchnic nerves which carry parasympathetic fibers. … The splanchnic nerves arise from within the sympathetic thoracic trunk to innervate the abdomen.

What does the thoracic splanchnic nerves do?

Thoracic splanchnic nerves are splanchnic nerves that arise from the sympathetic trunk in the thorax and travel inferiorly to provide sympathetic supply to the abdomen. The nerves contain preganglionic sympathetic fibers and general visceral afferent fibers.

Where is the splanchnic nerve located?

thoracic spinal cord The splanchnic nerves emerge from the lower seven thoracic spinal cord segments. They pass through the trunk ganglia to the celiac ganglia and superior mesenteric ganglia.

What do thoracic splanchnic nerves innervate?

The thoracic splanchnic nerves provide afferent and efferent autonomic (primarily sympathetic) and sensory innervation to many of the retroperitoneal viscera of the upper abdominal area.

What are the three splanchnic nerves?

On each side of the human body, they include the thoracic splanchnic nerves (greater, lesser and least or lowest), lumbar splanchnic nerve, sacral splanchnic nerve and pelvic splanchnic nerve (nervus erigentis).

What are splanchnic vessels?

The splanchnic circulation consists of the blood supply to the gastrointestinal tract, liver, spleen, and pancreas. It consists of two large capillary beds partially in series. The small splanchnic arterial branches supply the capillary beds, and then the efferent venous blood flows into the PV.

What is sympathetic splanchnic outflow?

The splanchnic organs represent a major target for sympathetic outflow and an important region for haemodynamic effects on cardiovascular homeostasis. … Thus PEEP ventilation altered mesenteric and hepatic perfusion, independent of any change in corresponding sympathetic nerve activity.