Enteric Nervous System

Enteric Nervous System

network of neurons buried in the lining of GI tract that controls function of digestive system

How can the ENs operate and how?

independently of the brain and spinal cord and communicates with CNS through the parasympathetic and sympathetic nervous systems

Parasympathetic Nervous System of GI

stimulates digestive activities

Sympathetic Nervous System of GI

inhibits digestive activities

ENS 2 Main Parts

submucosal and myenteric plexuses

submucosal plexus

• embedded in connective tissue of submucosa

• functions in regulating local secretions, absorption, contraction of submucosal muscle, and blood flow

myenteric plexus

• located between circular and longitudinal layer of muscularis externa

• exerts control over the motility of GI tract

• increases tone as well as rate, intensity, and velocity of contractions