| 词条 | Ischial tuberosity | ||||||||
| 释义 |
| Name = Ischial tuberosity | Latin = Tuber ischiadicum, tuberositas ischiadica | Image = Gray343.png | Caption = Capsule of hip-joint (distended). Posterior aspect. (Ischial tuberosity visible at bottom left.) | Image2 = Gray542.png | Caption2 = The superficial branches of the internal pudendal artery. (Ischial tuberosity visible at center left.) }} 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] The distance between a cyclist's ischial tuberosities is one of the factors in the choice of a bicycle saddle. DivisionsThe tuberosity is divided into two portions: a lower, rough, somewhat triangular part, and an upper, smooth, quadrilateral portion.
Additional imagesSee also
Notes1. ^{{cite book| title = Craniosacral Biodynamics: The Primal Midline and the Organization of the Body|first= Franklyn |last=Sills|edition=revised, illustrated| publisher = North Atlantic Books|location=Berkeley, CA| year = 2004| isbn = 1-55643-390-5| pages = 99| url = https://books.google.com/books?id=cEMVaxzHNXcC}} 2. ^Goossens (2005), pp 895–982 3. ^Platzer (2004), p 236 References{{Gray's}}
|vauthors=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 }}
| first = Werner | last = Platzer | title = Color Atlas of Human Anatomy, Vol. 1: Locomotor System | publisher = Thieme | isbn = 3-13-533305-1 | year = 2004 | edition = 5th }} External links
2 : Bones of the pelvis|Ischium |
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