Lumbosacral and Spinopelvic Anatomy and Pathology - S3, S4

Right Sacroiliac (SI) Joint Lesser Pelvis at S3-S4

Axial section through the right sacroiliac joint and lesser pelvis at the level of S3-S4
Axial section through the right sacroiliac (SI) joint and the lesser pelvis at the level of S3–S4 (note the vestige of the S3–S4 disc). At this level the internal iliac artery is approaching the SI joint, overlying the internal iliac vein which is in immediate contact with the joint. The layers and slightly different orientation of fibers of the gluteus maximus and medius muscles can be distinguished. The rectum portion of the colon is surrounded by lymph nodes (pink) and a rete of small vessels.

©2000 Wolfgang Rauschning, M.D., Ph.D.
Professor of Clinical Anatomy
Academic University Hospital
Department of Orthopaedic Surgery
Uppsala, Sweden
Reproduction without permission is prohibited
http://www.akademiska.se/
Updated on: 09/18/12
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