Dictionary of Human Evolution and Biology

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Ischium

One of a pair of bones (which fuse in the human adult) that forms the lower portion of the coxal bone. Ligaments and several muscles that move the leg have their origin on this bone. In most other primates the ischium is elongated and ends caudally in ischial tuberosities; these structures may be covered with callused skin.

See ischial callosity.

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