![SACROTUBEROUS AND SACROSPINOUS LIGAMENTS⠀[CADAVER DISSECTION ANATOMY]⠀The videos show a cadaver dissection of both ligam...](https://img4.findhealthclinics.com/439/860/1277540264398609.jpg)
16/11/2025
SACROTUBEROUS AND SACROSPINOUS LIGAMENTS
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[CADAVER DISSECTION ANATOMY]
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The videos show a cadaver dissection of both ligaments by .
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The SACROTUBEROUS LIGAMENT (STL) is a slender, fan-shaped ligament of the posterior pelvis located on either side of the body. This ligament arises midway down the posterior side of the sacrum, which is located at the spinal base.
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It is largely comprised of collagen fibers and is strong enough to support the sacrum and prevent it against moving from its position under the body weight.
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The connective tissue in this ligament joins with various other tissues, particularly the biceps femoris muscular tendon (Pic 6/7/8), which is associated with an important muscle of the hamstrings on the posterior thigh region. It is also a ligament of the sacroiliac joint, which is connected to the sacrum.
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This ligament can become stressed during aggressive physical activities and sports that may cause the arching of the spine. If it becomes strained or injured, it may result in problems similar to those of a typical iliolumbar ligament injury. The ossified or bony STL may be a critical factor in different types of neurovascular compression syndromes. An anatomical understanding of this ligament is crucial in order for patients to receive proper treatment for this clinical condition.
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The SACROSPINOUS LIGAMENT (SSL) is a triangular-shaped structure with its base attached to the anterior sacrum and coccyx, and its apex attached to the ischial spine. It forms a boundary of the greater and lesser sciatic foramen.
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The SSL borders the STL and shares fiber space with this ligament. SSL and STL work together to limit the upward tilt of the sacrum, called nutation. Both are most notably stressed when a person leans forward or stands up.
This pair of ligaments helps to transition the greater and lesser sciatic notches into the greater and lesser sciatic foramens.
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Several blood vessels, arteries and nerves surround this ligaments, including the pudendal vessels, the inferior gluteal artery, the pudendal nerve and the sciatic nerve (Pic 9).
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The tension of these ligaments should be assessed in our clients who have SIJ issues.
