Visceral Pain Sensations
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♦ Viscera are insensitive to
- cutting
- crushing
- burning
♦ However visceral pain is caused by
- Excessive distension
- Spasmodic contraction of smooth muscles
- Ischemia
♦ Referred pain :
Pain arising in viscera may also be felt in the skin or other somatic tissues, supplied by somatic nerves arising 
from the same spinal segment.♦ If the inflammation spreads from a diseased viscus to the parietal peritoneum it causes local somatic pain overlying body wall.
♦ In acute appendicitis pain is at first felt in the peri umbilical region (T10) and then is localised to Mcburney’a point.
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Category: Physiology MCQs
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