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Tuber of ischium

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tuber of ischium --> ischial tuberosity

The rough bony projection at the junction of the lower end of the body of the ischium and its ramus; this is a weight-bearing point in the sitting position; provides attachment for the sacrotuberous ligament and is the site of origin of the hamstring muscles.

Synonym: tuber ischiadicum, tuber of ischium.