1. Health
You can opt-out at any time. Please refer to our privacy policy for contact information.

Discuss in my forum



Updated May 14, 2012

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.


Anismus is a term formerly used to describe a dysfunction in the coordination of anal and rectal muscles during the process of defecation. The more currently accepted term for anismus is dyssynergic defecation.

For full information on anismus/dyssynergic defecation, see:

Also Known As:
  • Anal sphincter dyssynergia
  • Obstructive defecation
  • Paradoxical puborectal contraction
  • Pelvic floor dyssynergia
  • Pelvic outlet obstruction
  • Spastic pelvic floor syndrome
  1. About.com
  2. Health
  3. Irritable Bowel Syndrome (IBS)
  4. Glossary
  5. IBS Glossary A - B
  6. What Is Anismus

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.