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Updated: Apr 5, 2026
08:15
Gastrointestinal Motility Monitor GIMM
Published on: December 1, 2010
31.8K
Segmental colonic length and mobility
M Phillips1, A Patel1, P Meredith1
1Department of Physiology, Development and Neuroscience, University of Cambridge, UK.
Annals of the Royal College of Surgeons of England
|August 15, 2015
Summary
Rectosigmoid length significantly influences total colon length. Ascending and descending colon segments are more mobile than traditionally taught, impacting colorectal procedures and potentially colonoscopy difficulty in females. Jackson's membrane is common.
Area of Science:
- Anatomy
- Surgical Anatomy
Background:
- Colonic length and mobility vary regionally, impacting surgical and endoscopic procedures.
- Accurate anatomical understanding is crucial for effective colorectal interventions.
Purpose of the Study:
- To refine anatomical knowledge of the human colon by detailing segmental lengths and mobility.
- To investigate the relationship between colonic segments and overall colonic length variability.
Main Methods:
- Examination of 35 cadavers to measure lengths of the caecum, ascending, transverse, descending, and rectosigmoid colon.
- Characterization of colonic mobility based on mesenteric attachments.
- Documentation of Jackson's membrane presence.
Main Results:
- Mean total colonic length was 131.2cm (SD: 13.4cm).
- Rectosigmoid length was the best predictor of total colonic length.
- Significant mobility observed in the ascending (66%) and descending (33%) colon, more common in females.
- Jackson's membrane present in 66% of subjects.
Conclusions:
- Rectosigmoid length variability is a primary driver of total colonic length variation.
- Ascending and descending colon segments exhibit greater mobility than traditionally assumed, necessitating a revision of anatomical teaching.
- Ascending colon mobility in females may explain challenges during colonoscopy.
- Jackson's membrane is a frequent anatomical finding.
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