Follow us on Facebook Follow us on Twitter
Home About Us Bladder Bowel Resources Support Us News and Events Health Professionals Contact Sitemap
Healthy bladder Bladder Problems Treatments Products For Men For Women For Children Info and Advice

B&BF TV Advert

Loading the player ...

B&BF Corporate Supporters

Bladder and Bowel Foundation
Bladder and Bowel Foundation
Fundraising Standards Board



Print this page

Print this page

Email this page

Email this page


Bookmark this page
Top Border - Bladder and Bowel Foundation

Bladder > Bladder Problems > Spinal Injuries

Spinal Injuries

Spinal cord injury nearly always affects control over the bladder and bowel. This is because the nerves controlling these internal organ are attached to the base of the spinal cord and then pass down through the cauda equina, the 'horse's tail'. Messages are no longer passed from the nerves in the bladder and bowel to the brain, this means you will not get the message that tells you the bladder and bowel are full and it's time to go to the toilet.

Spinal cord injury and the bladder 

A reflex bladder allows automatic, involuntary control of the bladder so when the bladder fills above a certain level it contracts and urine flows out automatically. The reflex can be triggered by 'tapping' with the side of the hand at the base of the stomach, just above the pubic area; however, a rapid movement, laughter or spasm can also trigger bladder emptying when least expected.

Acontractile bladder is a result of a lower lesion injury, the reflex arc is also damaged, the bladder has no muscle tone and doesn't contract to empty automatically. Instead, it continues to fill and small amounts of urine may eventually dribble out. The bladder can be emptied at regular intervals by intermittent self-catheterisation.

Spinal cord injury and the bowel

Reflexic hypertonic bowel will continue to empty when stimulated, but you will lose the control you normally had from your brain. With this type of injury, the message telling you the bowel is full is not received; the muscle controlling the opening and closing of the anus stays tight. When the bowel gets full it empties automatically.

Flaccid hypotonic bowel will not fully empty, even when stimulated. This is because the damage to the cord has damaged the pathways from the bowel wall into the reflex centre in the spine. Therefore, there cannot be any reflex action. That means your reflexes do not work normally and the anal muscles stays relaxed.

Further Information

For more detailed information and support about SCI please visit the Spinal Injuries Association's website at

You can also contact them via their helpline number on Tel: 0800 980 0501.

You may also find the Duke of Cornwall Spinal Treatment Centre a usual resource. Please visit their website for more information. 

Last updated: 14/11/2014

Bottom Border - Bladder and Bowel Foundation

Spinal Injuries

Bladder and Bowel Foundation

Bladder Conditions and Symptoms affecting both women and men

Make a Difference

Donations are important to our work

The information contained within this website has been provided as a general guide and should not be treated as a substitute for the medical advice of your own GP or any other health professional.

B&BF is a registered charity no. 1085095 and a company limited by guarantee no. 4125585. Company Registered at SATRA, Rockingham Road, Kettering, Northants, NN16 9JH

© 2013 The Bladder & Bowel Foundation. All rights reserved.                                                         Privacy Statement and Terms & Conditions