Enteric Nervous System

Enteric Nervous System

1. neurons reside on wall of GIT

2. Independent, integrative nervous system

3. initiates, regulates, coordinates, etc. all aspects of muscular/secretory/absorptive elements of GIT

4. INNERVATION

   • MYENTERIC PLEXUS: found in between layers of muscularis externa
   • SUBMUCOSAL PLEXUS
   • Neurons
     • excitatory
       • ACh - excitatory transmitter
     • inhibitory
       • NANC- inhibitory transmitter

5. ANS Innervation

   • Parasympathetic
     • preganglionic
       • excites- via nicotinic
   • Sympathetic
     • postganglionic
       • inhibits- via noradrenalin