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Pelvis & Gluteal Reg Fill In The Blanks

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Question: List the main contents of the Greater foramenAnswer: -Sciatic Nerve -Piriformis muscle belly (fills majority of foramen) -NV bundle above and below piriformis Superior Nerve Inferior Gluteal Nerve -Posterior Femoral Cutaneous nerve medial to sciatic -Pudendal NV bundle medial to PFCN
Question: List the main of the Lesser sciatic foramenAnswer: 1. Obturator internus 2. Superior gemellus 3. Inferior . Nerves that innervate three muscles 5. Pudendal NV bundle-portion that supplies perineum region
Question: What are the bones of the pelvic girdle? Articulations?Answer: and 2 Os Coxae (innominate bones). Articulations: 2 Sacroiliac (synovial and syndesmotic) and Pubic Symphysis (cartilaginous)
Question: Describe the orientation of the obturator foramen to the acetabulum? What structure runs through it?Answer: Relative inferior and anterior. Obturator nerve (L2-L4 AD) runs through defect in superior of obturator membrane.
Question: The anterior portion of the SI joint on the illum is called the _____________and is the _____________portion of the joint. The posterior portion is called the ___________________portion of the SI joint.Answer: Auricular Surface. Synovial. Syndesmotic. (Interosseus SI -dense, irregular CT)
Question: In the auricular surface, the bony surface of the sacrum is covered with ________________ while the ilium is covered with__________________.Answer: Sacrum:Hyaline. Ilium:Fibrocartilage. Due to forces.
Question: SI fuse around which decade?Answer: Ebaugh: 3rd-5th decade. Pratt: Ankylosed by 6th decade in men and 1/3 . (degenerative changes in male 4th, female 5th)
Question: How much movement has been scientifically measured with the SI ?Answer: 1-3 or 2-5mm
Question: Ventral SI Ligament Answer: aspect. Ilium=>Sacrum
Question: Iliolumbar attachmentsAnswer: Transverse Process 5th Vertebrae=>Medial Aspect of Illium
Question: Which two ligaments help nutation of the sacrum? What are their attachments?Answer: Sacrospinous (sacrum=>ischial ) Sacrotuberous (sacrum=>ischial tuberosity)
Question: Which two ligaments reinforce the pubic joint?Answer: pubic ligament (superiorly) and the Arcuate ligament (inferiorly)
Question: Decribe the bony of the pelvic inletAnswer: In a =>sacral promontory, arcuate line, pectineal line of pubis, pubic tubercle
Question: Transverse plane that abdominal & pelvic cavityAnswer: Pelvic Inlet (note: False Pelvis= part of abdominal cavity and True = Pelvic Cavity)
Question: Name the boundaries of the cavityAnswer: Roof:pelvic inlet Anterior Wall:pubic bone Lateral Wall: pubic bone, , ischium Posterior Wall: sacrum Floor: Pelvic diaphragm (coccygeus and levator ani)
Question: What is the main significance of the “pelvic diaphragm” or pelvic floor?Answer: muscles are the major support for all the contents. Levator Ani: sheet of muscles, Coccygeus: relatively posterior. Also openings for rectum , urethra, vagina.
Question: Sciatic nerve typically exits the greater sciatic foramen with what relation to the piriformis? Inferior to piriformis ____% Partly below & through ____% Entire nerve pierces whole muscle ___%Answer: 85% ~14% ~1%
Question: What role do the sacrotuberous and sacrospinous ligaments play in the greater and lesser sciatic foramen? Answer: Ligaments are responsible for turning foramen into notches. Sacrotuberous ligament closes the notches off posteriorly while ligament divides foramen into greater and lesser portions.
Question: What is a “pectineal line”? Discuss on what bones they can be found on and their significance?Answer: A pectineal line refers to multiple-comb shaped lines. They can be found on surface of femur and ridge in superior ramus of pubic bone.
Question: What marks the thickest part of ?Answer: Marked by arcuate line. Line leads directly to heavy superior aspect of , which is major weight bearing portion of socket.
 
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