Innervation of intestines

Parasympathetic

Vagus nerve innervates most abdo viscera
S2-4 via prevertebral plexus - including pelvic viscera

Preganglionic fibres in CNS (forming pelvic splanchnic nerves)
Postganglionic/fibres leave in cranial nerves

Sympathetic

Visceral

see referred pain pathways: Colon - supply > innervation
Because it's midgut, probs T10-11 lesser splanchnic?

Enteric nervous system

  • myenteric and submucosal plexus
    • myenteric/Auerbach's plexus - between longit and circular muscle layers
    • submucosal/Meissner's plexus - submucosa
      Function: peristalsis, secretory...

#innervations #gastrointestinal #anatomy-abdomen

Curriculum item: Functional GI anatomy