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Sacrotuberous Ligament
Connective Tissue

Sacrotuberous Ligament

Ligamentum sacrotuberale

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Structure

The sacrotuberous ligament connects the ischial tuberosity to the lateral borders of the lower sacrum and upper coccyx. Its fibers run inferolaterally in an oblique fashion and form a ligamentous band which blends with the fascia surrounding the pudendal vessels. Along with the sacrospinous ligament, it converts the greater and lesser sciatic notches into the greater and lesser sciatic foramina.

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Function

The sacrotuberous ligament confers stability to the pelvis by limiting the movement of the pelvis and the sacrum. It permits the passage of neurovascular structures that supply the coccyx.

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Sacrotuberous Ligament

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Finally, the sacrotuberous ligament, an extensive structure, originates broadly from the posterior superior iliac spine and the dorsal and lateral aspects of the sacrum and coccyx to form a dense narrow fibrous band that inserts on the ischial tuberosity.

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