Bones and Joints of Pelvis Flashcards
What kind of joint is the sacroiliac joint?
synovial joint
What kind of joint is the pubic symphysis?
secondary cartilaginous joint
What are the three hip bones?
Ilium, ischium, and pubis
What landmarks are located on the superior margin of the iliac crest?
ASIS - anterior termination of crest
PSIS - posterior termination of crest
What are the name of the three surfaces of the ilium
iliac fossa internally, gluteal surface externally, and sacral surface for the sacroiliac joint
Where is the pectineal line?
on the superior surface of the pubis
Which group of muscles attach to the ischial tuberosity?
Hamstrings
Which part of the ischium delineates the greater and lesser sciatic notch?
ischial spine
What is the boundary of obturator foramen?
rami of the pubis and ischium
What is the prominent superior surface of the sacrum called?
sacral promontory
What is on either side of the sacral promontory?
lateral masses called the alar
T/F The greater pelvis is the true pelvis
False, it is the false pelvis as it is part of the posterior abdominal wall
What is the boundary of the pelvic inlet?
superior pubic symphasis, pubic crest, pectineal line, arcuate line of ilium, sacroiliac joint, sacral promontory
What is the most common pelvic type in 1) female 2) male
1) gynaecoid (50%)
2) android (30%) + anthropoid (20%)
T/F Pelvic outlet, unlike the inlet, has consistent shape for both male and female
True, it is diamond shaped, from pubic symphasis to ischial tuberosity then to coccyx
Where is the plane of least dimension?
between pelvic inlet and outlet, from S4 to base of pubic symphasis, while passing the ischial spine
What are the three sacroiliac ligaments reinforcing the joint capsule?
anterior, posterior and interosseous sacroiliac ligaments
Where does the iliolumbar ligament attach?
L5 to the ilium
Where does the sacrotuberous ligament attach?
sacrum to the ischial tuberosity
Where does the sacrospinous ligament attach?
sacrum to ischial spine
Which foramen is sacrospinous ligament directly related to
sciatic foramen, which is delineated by notches, and closed off by ligament
What actions can occur at the sacroiliac joint?
nutation - close pelvic inlet, open outlet
counter-nutation - open inlet, close outlet
T/F There is a fibrocartilage disc in the pubic symphysis
True, in the centre. Secondary cartilaginous joint has hyaline plate + fibrocartilage in the centre
What ligaments are found at the pubic symphysis?
superior pubic ligament above
inferior arcuate ligament below
What is the pubic symphysis reinforced by?
criss crossing fibres from oblique abdo muscles + aponeurosis of rectus sheath and adductor longus
