Ligament connecting mainly the L5 transverse process to the iliac crest and contributing to lumbosacral stability.
Anatomy
Organization and role
Its bundles and attachments vary. It helps resist displacement and mechanically links the lower spine to the pelvis without acting as an isolated stabilizer.
Clinical relevance and investigation
Pain near the iliac crest may originate from several tissues. An iliolumbar syndrome label remains a clinical hypothesis requiring differential assessment.
Points to consider
Stability depends on bones, capsules, ligaments, discs and muscles working together. Naming a joint or ligament does not establish injury. After trauma, their integrity must be considered before therapeutic mobilization.
Role of TAGMED care
At TAGMED, assessment aims to understand symptoms, history and functional limitations. Manual care and osteopathy, motorized spinal decompression, laser and shockwave have different indications. The term described in this entry is not enough to select any of these modalities. Their relevance, limitations and possible contraindications should be discussed in relation to diagnosis and individual goals.
Related concepts and distinctions
These concepts belong to the same field, but are not synonyms.
- Intertransverse ligaments — Ligaments connecting transverse processes of adjacent vertebrae and contributing to the restraint of some lateral movements.
- Sacrotuberous ligament — Ligament connecting the sacral and coccygeal region to the ischial tuberosity and contributing to posterior pelvic stability.
- Nuchal ligament — Posterior midline fibrous structure of the neck, functionally continuous with the supraspinous ligament and providing attachment for several neck muscles.
Conceptual guide: Iliolumbar ligament. Blocks summarize useful relationships; they are not an individual anatomical image.
Medical references
- OpenStax, Rice University. Anatomy and Physiology 2e — The Vertebral Column.
- Radiological Society of North America. RadLex Radiology Lexicon — terminology resource.
References document the topic; their inclusion does not imply endorsement of TAGMED services by those organizations.
Educational information from The Spine Page. This entry does not replace an individual assessment. Documentary version: October 13, 2026. Sylvain Desforges, B.Sc., D.O., N.D., osteopath and naturopath.
TAGMED clinic contact details
For non-urgent consultations and information about available services.
Clinique TAGMED — Terrebonne
1150, rue Lévis, Suite 200
Terrebonne (Québec) J6W 5S6
450‑704‑4447
Clinique TAGMED — Montréal
1140, avenue Beaumont
Mont-Royal (Québec) H3P 3E5
1‑877‑672‑9060
