Pelvic Girdle

Question 1

whatre the main functions of the pelvic girdle

Answer 1

transfer weight of the upper body from the axial skeleton to the lower appendicular skeleton for standing and walking

Question 2

primary joints of the pelvis

Answer 2

sacroiliac joint

pubic symphysis

Question 3

sacroiliac joint

Answer 3

strong
weight bearing
compound joint

Question 4

what does the sacroiliac joint consist of

Answer 4

anterior synovial joint and posterior syndesmosis

Question 5

anterior synovial joint of sacroiliac joint

Answer 5

auricular surfaces of the sacrum and ilium

limited mobility d/t role in transmitting BW to hip bones

Question 6

posterior syndesmosis of sacroiliac joint

Answer 6

tuberosities of the sacrum and ilium

Question 7

ligaments of the sacroiliac joint

Answer 7

anterior sacroiliac ligaments

interosseous sacroiliac ligaments

posterior sacroiliac ligaments

sacrotuberous ligament

Question 8

anterior sacroiliac joint

Answer 8

form the anterior part of the fibrous capsule of the synovial joint

Question 9

interosseous sacroiliac ligaments

Answer 9

Primary structure in transferring weight of the upper body to the axial skeleton to the pelvis and the distributing it

2 ilia –> Femurs during standing and Ischial tuberosities during sitting

Question 10

posterior sacroiliac ligaments

Answer 10

posterior external continuations of the interosseous sacroiliac ligaments

Question 11

sacrotuberous ligament

Answer 11

passes from the posterior ilium and lateral sacrum and coccyx to the ischial tuberosity

Question 12

sacrospinous ligament

Answer 12

passes from lateral sacrum and coccyx to the ischial spine

Question 13

movements of the sacroiliac joint

Answer 13

Limited to slight gliding and rotary movements (except when subject to considerable force)

Sacrotuberous and sacrospinous ligaments allow only limited upward movement (Inferior end of the sacrum)
 Providing resilience to the sacroiliac region when the vertebral column sustains sudden weight increases

Increased joint mobility during pregnancy (d/t relaxation of ligaments)

Question 14

pubic symphysis

Answer 14

secondary cartilinagous joint

formed by the union of the bodies of the pubic bones in the median plane

Question 15

articulations of pubic symphysis

Answer 15

interpubic disc is a fibrocartilaginous disc

connecting 2 pubic bones

Question 16

ligaments of pubic symphysis

Answer 16

superior pubic ligament

interior (arcuate) pubic ligament

Question 17

movements of pubic symphysis

Answer 17

Relaxation of the pubic symphysis permits as much as 10-15% increase in diameter of the pelvic outlet –>passage of the fetus through the pelvic canal

Question 18

other joints of the pelvic girdle

Answer 18

lumbosacral joint

sacrococcygeal joint