How is visceral pain?

This pain is diffuse because of 2 reasons: - Multiple organs will be innervated by the same C fibers, so the medullary center will not be able to well localize the pain. - Bilateral sensory supply to the spinal cord by these fibers → pain not well localized. o There are 2 explanations for this process: In embryology, the abdominal buds of multiple organs are covered by the visceral peritoneum and the parietal peritoneum. ⮚ The visceral peritoneum is in contact with the organs (colon, liver, etc.). ⮚ The parietal peritoneum covers the abdominal wall. Hence, the visceral peritoneum covering the organs originating from the same bud is the reason why they’re innervated by the same nerve: the liver, the colon, the spleen and other organs could all refer to one nerve in the CNS Visceral fibers come from the cervical spine to S4 (very extensive), which is why pain is less localized and more confusing.