Exam 4: Pelvis Flashcards
Pelvic inlet/brim
pectineal line of pubis, arcuate line of ilium, and sacral promontory
Greater pelvis (false pelvis)
lower part of abdominal cavity; superior to pelvic inlet
Lesser pelvis (true pelvis)
actual pelvis, inferior to pelvic inlet & superior to pelvic outlet
Sacrospinous ligament
Sacrum to ischial spine
help prevent anteroinferior displacement of superior sacrum
Form lesser sciatic foramina
Sacrotuberous ligament
sacrum to ischial tuberosity
help prevent anteroinferior displacement of superior sacrum
Form greater sciatic foramina
Female pelvis is different than male pelvis because
Pelvic inlet is oval, pelvic canal is short with parallel walls, IT and spines are everted, greater sciatic notch is broader, pubic arch and angle is broader, relatively short and broad sacrum
Lateral pelvic wall
Obturator internus - arises within lesser pelvis, travels through lesser sciatic foramen, and attaches to femur’s greater trochanter
Obturator membrane - lines obturator internus muscle
Posterior pelvic wall
piriformis - attaches to sacrum within lesser pelvis (through greater sciatic foramen) and attaches to femur’s greater trochanter
Bed for sacral nerve plexus
Pelvic floor
pelvic diaphragm
Supports viscera and aids voluntary control of urination and fecal continence
Made of levator ani and coccygeus
Levator ani
composed of puborectalis, pubococcygeus, and iliococcygeus
Puborectalis
Levator ani
muscular sling arising from pubis; maintains fecal continence
Pubococcygeus
Levator ani
arises from pubis & tendinous arch, attaches to coccyx
Iliococcygeus
Levator ani
arises from tendinous arch & ischial spine and blends with pubococcygeus
Coccygeus
ischial spine to coccygeus/sacrum
Apex of bladder
anterosuperior aspect
Fundus of bladder
posterior wall of bladder
Body of bladder
area between apex and fundus
Neck of bladder
constriction point
Trigone of bladder
triangle between ureteric and urethral openings
Walls of bladder
primarily detrusor muscles
Female urethra
descends anterior to vagina
urine exits via external urethral orifice
glands exit adjacent to urethra
Male urethra
longer, made of 4 parts
Preprostatic - neck of bladder to prostate
Prostatic - within prostate
Intermediate/Membranous - short, through external urethral sphincter
Spongy - longest, extends through penis
Infundibulum
funnel-shaped with fimbrae of uterine tube
Ampulla
widest and longest part of uterine tube
Isthmus
part of uterine tube entering uterine horns
Ovarian ligament
ovary to uterus