Pelvic Cavity

Question 1

borders of the greater pelvis

Answer 1

anterior – abdominal muscles

lateral – ilium

posterior – sacrum

Question 2

arcuate line

Answer 2

• separates the greater pelvis and true pelvis
• a continuation of the pubic crest onto the ilium

Question 3

parasympathetic nerve fibers for pelvic cavity

Answer 3

S2 - S4 – pelvic splanchnic

Question 4

how are the bones of the pelvic girdle held together?

Answer 4

dense CT holds the parts together

Question 5

sciatic nerves origins

Answer 5

L4 - S3

Question 6

mobility of synovial joints

Answer 6

highly mobile except for hip joint

Question 7

fancy name for pelvic floor

Answer 7

perineum

Question 8

lumbosacral trunk

Answer 8

L4 and L5

Question 9

male pelvis vs. female pelvis

Answer 9

Male

• thicker, heavier
• subpubic angle less than 90 degree angle

Female

• shallower, wider
• subpubic angle greater than 90 degree angle

Question 10

articulations of pelvis

Answer 10

four total articulations:

2 synovial joints (sacroiliac joints)
2 symphyses - pubic symphysis and sacral coccygeal joint

Question 11

bones that make up inominate bone

Answer 11

made of ischium, ilium, and pubis

Question 12

apex

Answer 12

tapering end of sacrum that articulates with coccyx

Question 13

coccyx

Answer 13

tailbone; no structural support; function is to give an attachment site; gluteal muscles attach here

Question 14

Boundaries of Perineum

Answer 14

Anterior

• pubic symphysis (ant.)

Lateral

• inferior pubic rami (lat)
• ischial rami (lat)
• ischial tuberosities (mid lat)
• gluteal maximus (post. and later)
• sacrum and coccyx (post)

Question 15

lumbar plexus origins

Answer 15

spinal nerves L1-L4

Question 16

sacral promontory

Answer 16

anterior lip at base of sacrum

the inwardly projecting anterior part of the body of the first sacral vertebra

Question 17

sacrum

Answer 17

• made of 5 fused vertebrae
• transfers body weight to pelvic girdle
• provides strength/stability for pelvic cavity

Question 18

lumbosacral plexus: function and location

Answer 18

• largest nerve supply for pelvis and perineum
• located behind the ascending and descending

Question 19

three parts that make up pelvis

Answer 19

2 inominate bones and 1 sacrum

Question 20

divisions of pelvic cavity

Answer 20

1. greater pelvis (false pelvis)
2. true pelvis (lesser pelvis)

Question 21

sympathetic nerve fibers for pelvic cavity

Answer 21

abdominopelvic splanchnic

Question 22

joint

Answer 22

structure at swhich two parts of the skeleton are fitted together

Question 23

synovial joint and examples

Answer 23

lines by synovial membrane

secretes synovial fluid

examples: knee, hip, shoulder

Question 24

when do the bones of the inominate bone fuse?

Answer 24

ages 15 to 17

Question 25

perineum

Answer 25

region overlying inferior pelvic aperture (opening)

Question 26

pelvic cavity

Answer 26

the inferior basin-shaped division of the abdominopelvic cavity

Question 27

sacral plexus origins

Answer 27

spinal nerves L4 - S4

Question 29

triangles of the perineum

Answer 29

* urogenital * anal

Question 30

borders of the true pelvis

Answer 30

**anterior** -- pubic symphysis **lateral** -- coxa (ischium and ilium) **posterior** -- sacrum

Question 31

symphysis

Answer 31

* type of cartilaginous joint held together by ligaments * contains fibrous cartilage

Question 32

median sacral crest/ridge

Answer 32

an unpaired crest formed by the fused spinous processes of the upper four sacral vertebrae; spinous processes of fused vertebrae