Anatomy of the Pelvis Flashcards
what is the bony pelvis
hip bones
sacrum
coccyx
what makes up each hip bone
ilium
ischium
pubis
what attaches to the pubic tubercle
inguinal ligment
what are the main joints of the pelvis
sacroiliac
hip
pubic symphysis
where are the ischial spines palpable of vaginal examination
a finger breadth into vagina at 4 oclock and 8 oclock positions
what two main ligament do we need to know in the pelvis
sacrotuberous
sacroillliac
what foraminae are formed by the ligaments of the pelvis
greater sciatic foramen
lesser sciatic foramen
what is the purpose of the ligaments of the pelvis
ensure the inferior part of the sacrum is not pushed superiorly when weight is suddenly transferred vertically through the vertebral column ie when jumping or in late pregnancy
what makes up the pelvic inlet
sacral promontory
illum
superior pubic ramus
pubic symphysis
what makes up the pelvic outlet
pupic symphysis ischiopubic ramus ischial tuberosities sacrotuberous liagmants coccyx
where does the pelvic cavity lie
between the pelvic inlet and the pelvic floor
what are the differences between a male and female pelvis
male pelvic inlet is narrower than female
male is more heart shaped but female ismore circular and wider.
the male pelvis is more tall and narrow while the female pelvis is more broad and flattened.
the angle beneath the ischia bones (the pubic arch) forms a much more acute angle in the male (90 degrees), and the pubic arch is higher in the male.
the obturator foramen in the male are round, whereas in the female they are oval
what is moulding
the movement of one bone over another to allow the foetal head to pass through the pelvis during labour
In which direction is the fetal skull longer
occipitofrontal diameter is longer than biparietal
what is the foetus’s station
the distance of the foetal head from the ischial spines - a negative number means the head is superior to the spines, a positve number means it is below
