Ischial tuberosity

Ischial tuberosity

Capsule of hip-joint (distended). Posterior aspect. (Ischial tuberosity visible at bottom left.)

The superficial branches of the internal pudendal artery. (Ischial tuberosity visible at center left.)
Details
Identifiers
Latin Tuber ischiadicum, tuberositas ischiadica
TA A02.5.01.204
FMA 17010

Anatomical terms of bone

The ischial tuberosity (or tuberosity of the ischium, tuber ischiadicum), also known informally as the sit bones, or as a pair the sitting bones[1] is a large swelling posteriorly on the superior ramus of the ischium. It marks the lateral boundary of the pelvic outlet.

When sitting, the weight is frequently placed upon the ischial tuberosity.[2] The gluteus maximus provides cover in the upright posture, but leaves it free in the seated position.[3]

Divisions

The tuberosity is divided into two portions: a lower, rough, somewhat triangular part, and an upper, smooth, quadrilateral portion.

Additional images

See also

Notes

  1. Sills, Franklyn (2004). Craniosacral Biodynamics: The Primal Midline and the Organization of the Body (revised, illustrated ed.). Berkeley, CA: North Atlantic Books. p. 99. ISBN 1-55643-390-5.
  2. Goossens (2005), pp 895–982
  3. Platzer (2004), p 236

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

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