Tuberosity of the ischium
- Tuberosity of the ischium
Infobox Bone
Name = Tuberosity of the ischium
Latin = tuber ischiadicum
GraySubject = 57
GrayPage = 235
Caption = Capsule of hip-joint (distended). Posterior aspect. (Tuberosity of ischium visible at bottom left.)
Caption2 = The superficial branches of the internal pudendal artery. (Tuber. ischial. visible at center left.)
System =
MeshName =
MeshNumber =
DorlandsPre = t_21
DorlandsSuf = 12827506
Posteriorly, the superior ramus of the ischium forms a large swelling, the tuberosity of the ischium (or ischial tuberosity).
It marks the lateral boundary of the pelvic outlet.
When sitting, the weight is frequently placed upon the ischial tuberosity. [cite journal | author = Goossens R, Teeuw R, Snijders C | title = Sensitivity for pressure difference on the ischial tuberosity. | journal = Ergonomics | volume = 48 | issue = 7 | pages = 895–902 | year = 2005 | pmid = 16076744 | doi = 10.1080/00140130500123647]
Divisions
The tuberosity is divided into two portions: a lower, rough, somewhat triangular part, and an upper, smooth, quadrilateral portion.
* The "lower portion" is subdivided by a prominent longitudinal ridge, passing from base to apex, into two parts;
** the outer gives attachment to the Adductor magnus,
** the inner to the sacrotuberous ligament.
* The "upper portion" is subdivided into two areas by an oblique ridge, which runs downward and outward;
** from the upper and outer area the Semimembranosus arises;
** from the lower and inner, the long head of the Biceps femoris and the Semitendinosus.
ee also
* Sitting disability
=Additional
References
External links
* - "The Female Perineum: Bones"
* - "Major Joints of the Lower Extremity: Hip bone (lateral view)"
* (NormanAnatomyFig|pelvisposterior, NormanAnatomyFig|pelvislateral, NormanAnatomyFig|pelvisinside)
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