MSK 4 - Pelvic Girdle

Question 1

describe the movement in the sacrum and coccyx vertebrae

Answer 1

no movement

Question 2

how many bones make up the pelvic girdle

Answer 2

2 coxal 1 sacrum

Question 3

what is the function of the pelvic girdle

Answer 3

transition between axial and appendicular skeleton, attachment point for muscle of pelvis and lower limb and for erectile bodies of external genetalia, weight bearing and weight transfer to lower limb

Question 4

what is the pubic symphysis

Answer 4

fibrocartilage joint connecting the two bones of the pelvis

Question 5

what is the symphysial surface of the pubic bone

Answer 5

where bones articulate at pubic symphysis

Question 6

what kind of joint is the sacro-iliac joint

Answer 6

fribrous (syndesmosis) and synovial (plane)

Question 7

what movement happens at the sacro-iliac joint

Answer 7

weight bearing joints allowing for little movement

Question 8

what is the iliac crest

Answer 8

thickened superior border of ilium that serves as an attachment point for many muscles

Question 9

what is the ischial tuberosity

Answer 9

sit bones, attachment for hamstring mm

Question 10

what is the sacral promontory

Answer 10

aterior projecting edge of body of S1

Question 11

what does the sacrotuberous ligament connect

Answer 11

sacrum to ischial tuberosity

Question 12

what does the sacrospinous ligament connect

Answer 12

sacrum to ischial spine

Question 13

what is the pelvic brim

Answer 13

bony edge surrounding and defining the pelvic inlet

Question 14

what is the sacral promontory

Answer 14

the most superior surface of the first sacral vertebra

Question 15

what is the pelvic inlet

Answer 15

circuit within pelvis

Question 16

what is the pelvic outlet

Answer 16

circle contains ischium and public symphysis

Question 17

false pelvic vs true pelvis

Answer 17

false = whole pelvis
true = just ischium sacrum coccyx pubis

Question 18

what and where is the obturator foramen

Answer 18

large holes in the ischium and pubic rami, closed by the obturator membrane

Question 19

what and where is the greater sciatic notch

Answer 19

ilium and ischium, angle between sacrum and ilum when looking laterally.

Question 20

what do the greater sciatic notch and sacrospinous ligaments form

Answer 20

greater sciatic foramen

Question 21

what passes through the greater sciatic foramen

Answer 21

piriformis m, sciatic n

Question 22

attachment of piriformis m

Answer 22

sacrum

greater trochanter of femur

Question 23

action of piriformis m

Answer 23

lateral rotation of hip joint

Question 24

what is the acetabulum

Answer 24

socket head of femur in the coxal bone

Question 25

what is the sacral canal

Answer 25

continuation of vertebral canal, contains sacral nerve roots in cauda equina

Question 26

what is the sacral hiatus

Answer 26

continuation of sacral canal, absense of lamina nd spinous process of S5

Question 27

what and where are anterior and posterior sacral foramina

Answer 27

exit of ventral and dorsal rami, holes in sacrum

Question 28

what is the purpose of C1-C4

Answer 28

rudimentary coccygeal vertebrae, act as attachment site for ligaments and muscles

Question 29

what are the three pelvic floor muscles / pelvic diaphragm

Answer 29

lavator ani (majority of floor and surrounds urogenital structures), coccygeus (posterior), piriformis (completes posterior edge)

Question 30

where are the perineum muscles relative to the pelvic diaphragm muscles

Answer 30

inferior

Question 31

which bones compose the acetabulum

Answer 31

ilium ischium pubis