key term - Greater splanchnic nerve

Definition

The greater splanchnic nerve is a bundle of nerve fibers that arises from the thoracic segment of the spinal cord and carries sympathetic nervous impulses to the abdominal organs. It plays a critical role in the autonomic regulation of abdominal visceral functions, including influencing the heart rate, digestive processes, and blood flow to various organs.

Related terms

Autonomic Nervous System:

This is the part of the nervous system that controls involuntary bodily functions such as heartbeat, digestion, and breathing.

Sympathetic Nervous System:

A division of the autonomic nervous system responsible for mobilizing body systems during activity; it's often characterized by its "fight or flight" response mechanisms.

Visceral Functions: These are automatic processes controlled by the body's internal organs, like digesting food or regulating blood pressure, without conscious effort from an individual