Parasympathetic and Sympathetic Innervation


Parasympathetic supply

  • Parasympathetic nerves that supply the oesophagus, stomach, small intestine, ascending colon, liver, gall bladder and pancrease arise from the medulla and conducted through the vagus nerve.
  • Parasympathetic nerves to the rest of the colon arise in sacral spinal cord and conducted through the pelvic nerves.
  • In general stimulatory
Sympathetic supply
  • arise in the spinal cord
  • Postganglionic fibres from the prevertebral ganglia innervate the GI tract.
  • In general inhibitory