Ischial tuberosity

From Infogalactic: the planetary knowledge core
(Redirected from Tuberosity of the ischium)
Jump to: navigation, search
Ischial tuberosity
Gray343.png
Capsule of hip-joint (distended). Posterior aspect. (Ischial tuberosity visible at bottom left.)
Gray542.png
The superficial branches of the internal pudendal artery. (Ischial tuberosity visible at center left.)
Details
Latin Tuber ischiadicum, tuberositas ischiadica
Identifiers
Dorlands
/Elsevier
t_21/12827506
TA Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value).
TH {{#property:P1694}}
TE {{#property:P1693}}
FMA {{#property:P1402}}
Anatomical terms of bone
[[[d:Lua error in Module:Wikidata at line 863: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]]

The ischial tuberosity (or tuberosity of the ischium, tuber ischiadicum), also known informally as the sitz bone, 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.

  • The lower portion is subdivided by a prominent longitudinal ridge, passing from base to apex, into two parts:
  • The upper portion is subdivided into two areas by an oblique ridge, which runs downward and outward:

Additional images

See also

Notes

  1. Lua error in package.lua at line 80: module 'strict' not found.
  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)

  • Lua error in package.lua at line 80: module 'strict' not found.
  • Lua error in package.lua at line 80: module 'strict' not found.


External links


<templatestyles src="Asbox/styles.css"></templatestyles>