Pelvis, Pelvic Diaphragm and Perineum Flashcards
The perineum is the area between the thighs that extends from the …. to the …..
coccyx to the pubis
Pelvic brim is marked by the…
sacral promontory and pubic crest
Which pelvic inlet is the broadest?
transverse diameter
What three lines make up the pelvic inlet?
obstetrical conjugate
diagonal conjugate
transverse diameter
The …conjugate is used to estimate the obstetrical conjugate.
diagonal
Which conjugate does the baby’s head pass through?
obstetrical conjugate
The three pelvic bones generally do not completely fuse into a single bone until age…
20-25
Subpubic angle in females?
Males?
90
60
Gynecoid
female shaped pelvis
Android
male shaped pelvis
Anthropoid
elongated anterior and posterior dimension
Platypelloid
broad pelvis
Pelvic fractures rarely break …
in a single place
SI joint is both … and …
fibrous and synovial
Pelvic diaphragm is formed by…
levator ani muscle
coccygeus muscle
Another name for coccygeus muscle is …
ishiococcygeus
3 subdivisions of the levator ani muscle…
puborectalis
pubococcygeu
iliococcygeus
Levator ani and coccygeus are innervated mainly by
S4
What muscle runs posterior to the anorectal junction pulling it anteriorly creating an anorectal angle?
puborectalis
What part of the levator ani muscle most clinically important in birthing?
pubococcygeus
Perineal body is a…
thick connective tissue mass
Perineal membrane creates what two spaces?
superficial perineal space
deep perineal space
In a straddle injury, where is the blood limited in its diffusion?
superficial perineal membrane
The external anal sphincter muscle is formed of skeletal muscle that has what three parts?
deep external sphincter
superficial external sphincter
subcutaneous external sphincter
