Pelvis I

Question 1

what is the superior boundary of the pelvic cavity

Answer 1

pelvic inlet or superior pelvic aperture (outlined by pelvic brim)

Question 2

what 5 things form the pelvic brim

Answer 2

1. crests of the pubic bones
2. pectineal lines (pectin pubis)
3. arcuate line of the ilium (laterally)
4. sacral promontory (posteriorly)
5. anterior border of the sacral ala

Question 3

what is the inferior boundary of the pelvic cavity

Answer 3

pelvic outlet

Question 4

what 4things form the pelvic outlet

Answer 4

1. pubic symphysis (inferiorly-anteriorly)
2. inferior pubic rami and ischial tuberosities (anterolaterally)
3. sacrotuberous ligaments (posterolaterally)
4. tip of last coccyx (posteriorly)

Question 5

what muscle closes off the pelvic outlet

Answer 5

pelvic diaphragm

Question 6

what 4 things make up the true pelvis (lesser pelvis or pelvis minor)

Answer 6

1. between pelvic outlet and inlet
2. inferiorly bounded by the pelvic diaphragm
3. bounded by the hip bones, coccyx, and sacrum
4. location of pelvic viscera (bladder and genital organs)

Question 7

what are the 7 contents within the lesser or true pelvis

Answer 7

1. ureters
2. bladder
3. pelvic genital organs
4. rectum
5. blood vessels
6. lymphatics
7. nerves

Question 8

3 details about the false pelvis (greater pelvis)

Answer 8

1. superior to the pelvic inlet
2. location of the ileum and sigmoid colon
3. bounded by abdominal wall anteriorly, iliac fossae, and L5-S1 vertebrae

Question 9

M or F: subpubic angle - 50 to 60 degrees

Answer 9

M

Question 10

M or F: subpubic angle - 80 to 85 degrees

Answer 10

F

Question 11

M or F: more rugged looking ishiopubic ramus due to the attachment of the penile crura

Answer 11

M

Question 12

what are the 5 different joints of the pelvic ring

Answer 12

1. lumbosacral z joint (planar synovial)
2. L5-S1 IVD (secodnary amphiarthrodial)
3. hip joints (synovial, ball and socket)
4. sacroiliac (atypical; synovial)
5. pubic symphysis (secondary; amphiarthrodial)

Question 13

ligament that blends with the articular capsule (innervation: APD S1-2)

Answer 13

anterior SI ligament

Question 14

ligament that has both long and short parts to it

Answer 14

posterior SI ligament

Question 15

ligament that attaches PSIS to sacrotuberous ligament

Answer 15

long part: posterior SI

Question 16

ligament that attaches S1 and S2 tubercles to iliac crest and iliac tuberosity

Answer 16

short part: posterior SI

Question 17

ligament that attaches the apex of the sacrum to the coccyx bone; anterior portion continues inferiorly from the ALL (anterior longitudinal ligament)

Answer 17

sacrococcygeal ligament

Question 18

two ligaments that limit the inferior sacral movement in the posterior and superior direction

Answer 18

sacrotuberous and sacrospinous ligaments (limit nutation)

Question 19

ligaments that connect the pubic bodies along their superior and inferior surfaces

Answer 19

superior and inferior pubic ligaments

Question 20

ligament that attaches the L5 TRANSVERSE PROCESS to the ilium and sacrum

Answer 20

iliolumbar ligament

Question 21

vertical band of the iliolumbar ligament does what

Answer 21

L5 to iliac fossa

Question 22

horizontal band of the iliolumbar ligament does what

Answer 22

L5 to iliac crest and is the partial attachment of the QL

Question 23

what ligament attaches the superior, middle, and inferior sacral fossa to the iliac tuberosity and surrounding areas

Answer 23

interosseous ligament (strongest in body)

Question 24

anterior wall of the pelvis

Answer 24

bodies and rami of the pubic bones and pubic symphysis

Question 25

lateral wall of the pelvis

Answer 25

ilium and ischium; obturator membrane

Question 26

posterior wall of the pelvis

Answer 26

sacrum and coccyx, SI joints and associated ligaments

Question 27

obturator internus origin, insertion and innervation

Answer 27

O: ilium, ischium, and obturator membrane
I: greater trochanter
Inn: nerve to obturator internus L5-S2

Question 28

piriformis origin, insertion, and innervation

Answer 28

O: anterior surface of sacrum, superior margin of greater sciatic notch, and sacrotuberous ligament
I: greater trochanter
Inn: nerve to piriformis S1-2

Question 29

what is the largest structure exiting the lesser sciatic foramen

Answer 29

obturator internus

Question 30

what is the largest structure exiting the greater sciatic foramen

Answer 30

piriformis

Question 31

pelvic floor muscle that is a broad sheet made in 3 pats name by their attachments

Answer 31

levator ani muscle (S3-4 levels)

Question 32

largest part of levator ani and attaches from the posterior pubic bodies to the coccyx

Answer 32

pubococcygeus m

Question 33

most medial part of levator ani and forms the perineal flexure which is important in maintaining fecal continence

Answer 33

puborectalis m

Question 34

what muscle forms the external anal sphincter

Answer 34

puborectalis m

Question 35

most posterior part of levator ani; originating ischial spine, tendonous arch area and inserting on the perineal body and anococcygeus ligament region

Answer 35

iliococcygeus m

Question 36

muscle that flexes coccyx in parturition and defecation; supports pelvic floor

Answer 36

coccygeus m

Question 37

the muscle along the levator ani form the

Answer 37

pelvic diaphragm

Question 38

the coccygeus m and the _____ ligament have the exact same orientation

Answer 38

sacro-spinous ligament