Ischial tuberosity
(Redirected from
Tuberosity of the ischium
)
| Ischial tuberosity | |
|---|---|
 Capsule of hip-joint (distended). Posterior aspect. (Ischial tuberosity visible at bottom left.) | |
| Details | |
| Identifiers | |
| Latin | tuber ischiadicum, tuberositas ischiadica |
| TA98 | A02.5.01.204 |
| TA2 | 1342 |
| FMA | 17010 |
| Anatomical terms of bone | |
The ischial tuberosity (or tuberosity of the ischium, tuber ischiadicum), also known colloquially as the sit bones or sitz bones,superior ramus of the ischium. It marks the lateral boundary of the pelvic outlet.
When
cyclist's ischial tuberosities is one of the factors in the choice of a bicycle saddle
.
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 outer gives attachment to the
- The upper portion is subdivided into two areas by an oblique ridge, which runs downward and outward:
- From the upper and outer area the semimembranosusarises
- From the lower and inner, the long head of the semitendinosus
- From the upper and outer area the
Additional images
-
Muscles of the gluteal and posterior femoral regions, with ischial tuberosity highlighted in red -
Right hip bone. External surface. -
Right hip bone. Internal surface. -
Plan of ossification of the hip bone -
Diameters of inferior aperture of lesser pelvis (female) -
Right hip-joint from the front -
Theobturator externus -
Anterior view of the pelvis with the ischial tuberosity labelled in the lower part of the image
See also
Notes
- ^ M.D, John R. Schultz (October 28, 2019). "Sit Bones Pain (aka Sitz Bone)". Centeno-Schultz Clinic. Retrieved April 12, 2020.
- ISBN 1-55643-390-5.
- ^ Goossens (2005), pp 895–982
- ^ Platzer (2004), p 236
References
This article incorporates text in the public domain from page 235 of the 20th edition of Gray's Anatomy (1918)
- Goossens R, Teeuw R, Snijders C (2005). "Sensitivity for pressure difference on the ischial tuberosity". Ergonomics. 48 (7): 895–902. S2CID 854065.
- Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol. 1: Locomotor System (5th ed.). ISBN 3-13-533305-1.
External links
- pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (pelvisposterior, pelvislateral, pelvisinside)
