The effect of feeding on defecation behaviour in pigs

Frauke Musial, Michael D. Crowell, Allan W. French

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The effect of eating on defecation behaviour was investigated in four 20-30 kg pigs. Rectal distention stimulation was performed pre- and postprandially at 10 cm from the anus with a 5 cm latex balloon. Volume was increased in steps of 10 ml up to 200 ml of air or until balloon defecation. Dependent measures were volume, rectal pressure, determined with a solid state pressure transducer inside the balloon probe, rectal compliance, and an index of distention induced contractile activity. The volume and pressure required to elicit defecation was significantly lower after feeding (p<0.01). Distention induced contractile activity was significantly increased near defecation threshold, but pre- and postprandial conditions were not different. There was no difference in rectal compliance pre- and postprandially. These results suggest that eating lowers defecation threshold in terms of distention volume and rectal pressure, and that these changes are not dependent on altered rectal compliance or changes in distention induced motor activity.

Original languageEnglish (US)
Pages (from-to)643-646
Number of pages4
JournalPhysiology and Behavior
Issue number3
StatePublished - Mar 1992


  • Compliance
  • Defecation
  • Feeding
  • Pigs
  • Pressure
  • Rectal balloon distention
  • Volume

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Behavioral Neuroscience


Dive into the research topics of 'The effect of feeding on defecation behaviour in pigs'. Together they form a unique fingerprint.

Cite this