Pelvis 1 Part 1: Skeleton

Question 1

pelvic cavity

Answer 1

continuation of the abdominal cavity into the pelvis via pelvic inlet

Question 2

perineum

Answer 2

inferior to the floor of the pelvic cavity

Question 3

pelvic girdle

Answer 3

-articulates with axial skeleton
-supports lower limbs and visceral organs of the pelvis

Question 4

os coxae

Answer 4

fusion of ilium ischium and pubic that articulate with each other at pubic symphysis and sacrum

Question 5

ilium

Answer 5

-body, ala, iliac crest, anterior superior iliac spine, anterior inferior iliac spine, posterior superior iliac spine, posterior inferior iliac spine

Question 6

anterior, posterior, and inferior gluteal lines

Answer 6

attach gluteal muscles

Question 7

iliac fossa

Answer 7

houses iliacus

Question 8

articular surface

Answer 8

articulates with the sacrum forming sacroiliac joint

Question 9

arcuate line

Answer 9

superior boundary of true pelivs

Question 10

Ischium

Answer 10

-Ischial body and ramus
-Ischial spine
-ischial tuberosity
-lesser sciatic notch

Question 11

Ischial spine

Answer 11

attaches supraspinous ligament with sacrum

Question 12

Ischial tuberosity

Answer 12

attaches sacrotuberous ligament with sacrum and hamstrings

Question 13

sacrospinous ligament

Answer 13

-attaches sacrum with ischial spine
-converting greater sciatic notch into greater sciatic foramen and lesser sciatic notch into lesser sciatic foramen

Question 14

Pubis

Answer 14

-body
-superior/inferior rami
-pubic symphysis
-pubic crest
-pubic tubercle
-pectineal line

Question 15

pubic crest

Answer 15

rectus abdominis and external oblique muscle

Question 16

pubic tubercle

Answer 16

attaches inguinal ligament

Question 17

pectineal line

Answer 17

line along superior ramus

Question 18

obturator foramen

Answer 18

almost completely closed by the obturator membrane aside from the obturator nerve and obturator artery that pass through

Question 19

acetabulum

Answer 19

deep socket that limits the range of motion at the hip

Question 20

pelvic brim

Answer 20

separate greater pelvis from lesser pelvis

Question 21

greater pelvis

Answer 21

false pelvis, part of the abdominal cavity

Question 22

lesser pelvis

Answer 22

true pelvis, part of the pelvic cavity

Question 23

contents of pelvic brim

Answer 23

-superior margin of the pubic symphysis
-pectineal line
-arcuate line
-sacral promontory

Question 24

delineation of the pelvic inlet

Answer 24

delineated by the pelvic brim, the superior opening of the lesser pelvis
-infant head enters as labor begins

Question 25

pelvic outlet

Answer 25

inferior opening of true pelvis (outlet inferior to inlet)

Question 26

lumbosacral joints

Answer 26

synovial joints between articular processes of L5 adn S1 and symphyseal joint at intervertebral disc

Question 27

sacroiliac joints

Answer 27

-strong weight-bearing anterior synovial joints and posterior syndesmosis joints
-have secondary support via sacrotuberous ligament and sacrospinous ligament

Question 28

pubic symphysis

Answer 28

-articulation between pubic bodies
-interpubic fibrocartilage discs and superior and inferior pubic ligaments

Question 29

sacrococcygeal symphysis

Answer 29

a small disc supported by sacrococcygeal ligaments