UKCD ANA534 Pelvis Word Scramble
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Question | Answer |
Which bones fuse to form the hip (innominate) bone? | The ilium, ischium and pubis. |
What are the 3 joints of the pelvis and what type of joint is each one? | The sacroiliac (synovial); intervertebral disc (fibrous); and pubic symphysis (cartilaginous). |
Define the attachments of the sacrotuberous and sacrospinous ligaments. | Sacrotuberous: dorsal aspect of sacrum to ischial tuberosity; sacrospinous: lateral aspect of the sacrum to the ischial spine. |
What two foramina are formed by these structures? | Greater (via sacrospinous lig.) and lesser (via sacrotuberous lig.) sciatic foramena. |
Name the muscles that form the walls of the pelvis? | Obturator internus and piriformis. |
What is the innervation of these muscles? | Obturator internus: n. to obturator internus (L5, S1.2); and piriformis: (S1,2). |
What muscles form the floor of the pelvis? | Coccygeus and levator ani mm. (pubococcygeus + iliococcygeus - deeper fibers of the latter = puborectalis) |
Where do the muscles of the pelvic floor arise? | Coccygeus: ischial spine to lateral margin of sacrum & coccyx; and levator ani: pubis and tendinous arch of obturator internus to coccyx. |
What is the innervation of these muscles? | S2,3,4. |
What do these muscles form a sling around? | Lower rectum/upper anal canal |
What is the perineal body? | A connective tissue mass. |
Where is the perineal body located? | Between the anus and the base of the scrotum in the male or the posterior aspect of the vagina in the female. |
Why is the perineal body clinically important? | It is either incised, or avoided, in episiotomies during childbirth. |
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