However, it is now more commonly accepted that the haustra form because of enteric nervous system activity.

[1] Haustral contractions are slow segmenting, uncoordinated movements that occur approximately every 25 minutes.

These differences can assist in distinguishing the small intestine from the colon on an abdominal x-ray.

[2] Localized ahaustral distended colon can be seen on abdominal x-ray during obstruction or volvulus.

Sigmoidal volvolus, more often seen in psychiatric and neurologically impaired patients (e.g. Parkinson's disease), shows lack of haustra on x-ray and points from the pelvis to the right upper quadrant just below the diaphragm.