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The ischial tuberosity (or tuberosity of the ischium, tuber ischiadicum), also known colloquially as the sit bones or sitz bones, [1] or as a pair the sitting bones, [2] is a large posterior bony protuberance on the superior ramus of the ischium. It marks the lateral boundary of the pelvic outlet.
It then spreads along the ischial ramus as the falciform process, whose concave edge blends with the fascial sheath of the internal pudendal vessels and pudendal nerve. The lowest fibres of gluteus maximus are attached to the posterior surface of the ligament; superficial fibres of the lower part of the ligament continue into the tendon of ...
Adoption of ischium into English-language medical literature dates back to c. 1640; the Latin term derives from Greek ἰσχίον iskhion meaning "hip joint". The division of the acetabulum into ischium (ἰσχίον) and ilium (λαγών, os lagonicum) is due to Galen, De ossibus. Galen, however, omits mention of the pubis as a separate ...
The lesser sciatic foramen is an opening between the pelvis and the back of the thigh. The foramen is formed by the sacrotuberous ligament which runs between the sacrum and the ischial tuberosity and the sacrospinous ligament which runs between the sacrum and the ischial spine.
The anal triangle can be defined either by its vertices or its sides.. Vertices. one vertex at the coccyx bone; the two ischial tuberosities of the pelvic bone; Sides. perineal membrane (posterior border of perineal membrane forms anterior border of anal triangle)
In anatomy, the Nelaton's Line (also known as the Roser-Nélaton line) is a theoretical line, in the moderately flexed hip, drawn from the anterior superior iliac spine to the tuberosity of the ischium. It was named for German surgeon and ophthalmologist Wilhelm Roser and French surgeon Auguste Nélaton.
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The ischium is the strongest of the three regions that form the hip bone. It is divisible into three portions: the body, the superior ramus, and the inferior ramus. The body forms approximately one-third of the acetabulum. The ischium forms a large swelling, the tuberosity of the ischium, also referred