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Obturator Membrane
The obturator membrane is a thin fibrous sheet, which almost completely closes the obturator foramen. Its fibers are arranged in interlacing bundles mainly transverse in direction; the uppermost bundle is attached to the obturator tubercles and completes the obturator canal for the passage of the obturator vessels and nerve. The membrane is attached to the sharp margin of the obturator foramen except at its lower lateral angle, where it is fixed to the pelvic surface of the inferior ramus of the ischium The ischium (; : is ...
, i. e., within the margin. Both obturator muscles are connected with this mem ...
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Obturator Foramen
The obturator foramen is the large, Bilateral symmetry, bilaterally paired opening of the bony pelvis. It is formed by the pubis and ischium. It is mostly closed by the obturator membrane except for a small opening, the obturator canal, through which the obturator nerve and vessels pass. Structure The obturator foramen is situated inferior and somewhat anterior to the acetabulum. It is bounded by the pubis bone and the ischium: superiorly by the (grooved obturator surface) of the Superior rami of the pubes, superior ramus of pubis, inferiorly by the Ischium#Structure, ramus of ischium, and laterally by (the anterior edge of) the body of ischium (including by the margin of the acetabulum). The margin of the foramen is thin and uneven, and gives attachment to the obturator membrane. Superiorly, it presents a deep groove - the obturator groove - which passes obliquely inferomedially from the pelvis. The foramen is largely closed by the obturator membrane save for a small opening at ...
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Obturator Tubercle
Obturator may refer to: Medicine Anatomical structures * Obturator foramen * Obturator fascia * Obturator canal * Obturator vessels (other) ** Obturator artery ** Obturator veins * Obturator nerve ** Anterior branch of obturator nerve ** Posterior branch of obturator nerve ** Cutaneous branch of the obturator nerve * Obturator internus nerve * Accessory obturator nerve * Obturator membrane * Obturator crest * Obturator muscles (other) ** Obturator internus muscle ** Obturator externus muscle * Obturator externus groove * Obturator process (in archosaurs) Diseases and disorders * Obturator hernia Medical procedures * Obturator sign Medical devices * Part of a trocar device * A device used as a guide during tracheostomy tube insertion * Palatal obturator, a dental prosthesis used to seal an opening in the palate, i.e. cleft palate Botany * Part of the ovary of a flower that chemically guides the pollen tube to the micropyle Engineering * Obturator ring, a ...
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Obturator Canal
The obturator canal is a passageway formed in the obturator foramen by part of the obturator membrane and the pelvis. It connects the pelvis to the thigh. Structure The obturator canal is formed between the obturator membrane and the pelvis. The obturator artery, obturator vein, and obturator nerve all travel through the canal. Clinical significance An obturator hernia is a type of hernia involving an intrusion into the obturator canal. The obturator nerve can be compressed in the obturator canal. The obturator canal may be compressed during pregnancy Pregnancy is the time during which one or more offspring gestation, gestates inside a woman's uterus. A multiple birth, multiple pregnancy involves more than one offspring, such as with twins. Conception (biology), Conception usually occurs ... and major traumatic injuries, causing obturator syndrome. See also * Obturator fascia References External links Pelvis {{Anatomy-stub ...
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Inferior Ramus (other)
Inferior ramus may refer to: * Inferior ramus of the ischium * Inferior pubic ramus In vertebrates, the pubis or pubic bone () forms the lower and anterior part of each side of the hip bone. The pubis is the most forward-facing (ventral and anterior) of the three bones that make up the hip bone. The left and right pubic bones ar ... {{disambig ...
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Ischium
The ischium (; : ischia) is a paired bone forming the lower and back part of the hip bone. Situated below the ilium (bone), ilium and behind the pubis (bone), pubis, it is one of three regions whose fusion creates the coxal bone. The superior portion of this region forms approximately one-third of the acetabulum.


Structure

The ischium is made up of three parts–the body, the superior ramus and the inferior ramus. The body contains a prominent ischial spine, spine, which serves as the origin for the superior gemellus muscle. The indentation inferior to the spine is the lesser sciatic notch. Continuing down the posterior side, the ischial tuberosity is a thick, rough-surfaced prominence below the lesser sciatic notch. This is the portion ...
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Obturator Muscles (other)
Obturator muscles may refer to: * External obturator muscle * Internal obturator muscle The internal obturator muscle or obturator internus muscle originates on the medial surface of the obturator membrane, the ischium near the membrane, and the rim of the pubis. It exits the pelvic cavity through the lesser sciatic foramen. The ... {{disambig ...
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