Anorectum Physiology

  • Yong Geul Joh


Prior to selecting the necessary anorectal physiology test, it is important to obtain helpful information from detailed hearing of medical history and after a detailed digital rectal examination (DRE). At the moment of desire to defecate, the internal sphincter slightly relaxes, and the external sphincter contracts to define whether the content is gas, watery, or solid stool by recto-anal inhibitory reflex. Basic anorectal function tests including anorectal manometry, electromyography, dynamic proctography, colon motility test, and anal ultrasonography are performed prior to the surgery to give actual help to the clinician in the case with the possibility of dysfunction of bowel movement or with bowel movement disorder. Despite the limitations, the role of an anorectal physiology function laboratory will become increasingly important in dealing with complex anorectal diseases.


Anorectal physiology Manometry Defecography Anal ultrasonography 


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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Yong Geul Joh
    • 1
  1. 1.Jangnhang ClinicHanamSouth Korea

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