Male and Female Pelvis Flashcards
Osteology of pelvis (5)
Ischium Pubis Ileum Sacrum Pubic symphysis
the socket of the ball-and-socket joint of the hip
acetabulum
landmarks above and below ischial spine
Greater (above) and lesser (below) sciatic notch
houses pelvic cavity and support for perineum
lesser, true pelvis
protection for inferior abdominal viscera
greater, false pelvis
greater and lesser pelvis are divided by
the oblique plane of the pelvic inlet
Borders of pelvic inlet (aka superior pelvic aperture)
Superior pubic ramus
arcuate line (ilium)
sacral promontory
pubic crest
borders of pelvic outlet (inferior pelvic aperture)
pubic symphysis inferior pubic ramus, ischial ramus ischial tuberosities sacrotuberous ligamet tip of coccyx
joints of pelvis
sacroiliac
pubic symphysis
lumbosacral
strong weight bearing joint of pelvis
sacroiliac
fibrocartilaginous interpubic disc
pubic symphysis
facets of the S1 vertebrae interlock with facets of the L5 vertebrae to make a zygopophyseal joint called the
lumbosacral joint
ligaments of pelvis
iliolumbar
sacroiliac
sacrotuberous
sacrospinous
ligaments radiating from L5 vertebra to ilium
iliolumbar ligament
assist in suspending the sacrum between the iliac bones
posterior and anterior sacroiliac ligaments
massive ligament that passes from posterior ilium and lateral sacrum and coccyx to ischial tuberosity making a large sciatic foramen
sacrotuberous ligament
runs from lateral sacrum and coccyx to ischial spine
divides it into the greater sciatic foramen and lesser sciatic foramen
sacrospinous ligament
anterior pelvic wall
pubis bone
pubic symphysis
lateral pelvic wall
obturator internus muscle
obturator fascia
- tendinous arch
posterior pelvic wall
sacrum
sacroiliac joints
piriformis
pelvic floor is formed by
pelvic diaphragm muscle
pelvic diaphragm muscle consists of (2)
coccygeus muscle
levator ani muscle
function of pelvic floor
forced expiration, coughing, vomiting, urination, defecation, support of trunk when lifting, supports abdominopelvic viscera, resists increases in abdominal pressure
Three parts of levator ani muscle
puborectalis
pubococcygeus
iliococcygeus
Nerves of lumbar plexus
T12-L5 Lumbosacral trunk femoral obturator lateral femoral cutaneous
Nerves of sacral plexus
L4-S4
Sciatic nerve
Pudendal nerve
Nerves of coccygeal plexus
S4, S5 and coccygeal nerves
pierce obturator membrane
obturator nerve and artery
chief sensory nerve of the external genitalia
pudendal nerve
supplies the pelvic surface to the coccygeal muscle (nerve)
coccygeal nerve
largest nerve of the body, passes through greater sciatic foramen to enter the gluteal region
sciatic nerve
pouch formed from the peritoneum over the uterus and bladder
vesicouterine pouch
created by vesicouterine pouch; endometrial seeding in this region causes cyclical pain in women of child bearing age
Dunn’s pouch
pelvic viscera
bladder and part of the ureters, reproductive system, and distal part of the rectum
in males, the ureters lie __________
in females, the ureters lie _________
behind the ductus deferens
under the uterine artery
urinary trigone
two urethral openings
one urethral opening
muscles of bladder
detrusor muscle
internal urethral sphincter
divisions of male urethra
prostatic, membranous, and spongy
male internal genital organs (5)
ductus deferens ejaculatory ducts seminal vesicles prostate bulbourethral glands
female pelvic organs (4)
vagina
uterus
uterine tubes
ovaries
layers of uterine wall
perimetrium
myometrium
endometrium
landmarks of uterus
fundus
body
cervix
ligaments of uturus
round ligament
broad ligament
opening of the cervical canal into the vagina
external os
three parts of uterine tube
isthmus
ampulla
fimbriae
normal position of uterus
anteverted and anteflexed (flexed over the bladder)
bloody supply to pelvis
Inferior mesenteric artery - superior rectal artery Internal iliac artery - middle rectal artery Internal pudendal artery - inferior rectal artery
superior rectal artery branches from
inferior mesenteric
middle rectal artery branches from
internal iliac
inferior rectal artery branches from
internal pudendal
the superior rectal vein drains into the
inferior mesenteric vein
middle and inferior rectal veins drain into the
internal iliac vein
fibrous tunnel in the obturator internus facia
pudendal (alcock) canal
contents of pudendal canal
internal pudendal artery and vein
pudendal nerve